What are the symptoms of a mosquito bite allergy. How do mosquito bites affect different people. Why do some people react more severely to mosquito bites. What are the best ways to treat and prevent mosquito bites.

Understanding Mosquito Bites: Why Do They Occur?

Mosquito bites are a common nuisance, but have you ever wondered why they happen in the first place? Only female mosquitoes bite humans, and they do so for a specific reason. These insects require blood as a protein source for egg development. When a female mosquito bites, she inserts her proboscis (a needle-like mouth part) into a blood vessel and injects saliva containing anticoagulant proteins. These proteins prevent blood clotting, allowing the mosquito to feed efficiently.

The proteins in mosquito saliva are responsible for the reactions we experience after a bite. These reactions can vary significantly from person to person, ranging from barely noticeable to severe allergic responses. Understanding the science behind mosquito bites can help us better manage and prevent these irritating incidents.

Common Mosquito Bite Reactions: From Mild to Moderate

Mosquito bite reactions can be categorized based on their severity. Here are the most common types of reactions:

Minor Mosquito Bite Allergy: Small Red Bumps

The most typical reaction to a mosquito bite is the appearance of a small, round, white-ish bump with a visible dot at the center. This bump usually becomes red and firm within 1-2 days after the bite. This minor allergic reaction is a response to the proteins in the mosquito’s saliva and is more of an annoyance than a serious concern.

Moderate Mosquito Bite Allergy: Welts

Some individuals may experience a more pronounced reaction in the form of welts. These are slightly raised, smooth, flat-topped bumps that appear redder than the surrounding skin. This reaction occurs in people who are more sensitive to mosquito saliva proteins. Interestingly, the severity of the reaction can also depend on how long the mosquito feeds, as longer feeding times allow more proteins to be introduced into the skin.

Severe Mosquito Bite Allergies: When to Be Concerned

While most mosquito bite reactions are mild, some individuals may experience more severe allergic responses. These can include:

Skeeter Syndrome

Skeeter syndrome is a more extreme allergic reaction to mosquito bites. It’s characterized by:

• Excessive swelling of the bite area
• Heat and redness around the bite
• Intense itching or pain
• Fever
• Possible blistering and oozing

While anyone can develop skeeter syndrome, it’s more common in young children, individuals with immune system disorders, and travelers exposed to new types of mosquitoes.

Anaphylaxis: A Rare but Serious Reaction

In extremely rare cases, mosquito bites can trigger anaphylaxis, a severe and potentially life-threatening allergic reaction. Symptoms of anaphylaxis include:

• Hives
• Swelling of the lips or tongue
• Difficulty breathing
• Wheezing or coughing
• In severe cases, loss of consciousness

If you suspect anaphylaxis from a mosquito bite, seek immediate medical attention. Treatment typically involves injectable epinephrine and emergency medical care.

Why Do Some People React More Severely to Mosquito Bites?

The variation in mosquito bite reactions among individuals is a fascinating aspect of human biology. Several factors contribute to these differences:

Immune System Sensitivity

The primary reason for varying reactions is the individual’s immune system sensitivity to mosquito saliva proteins. Some people’s immune systems react more aggressively to these foreign substances, leading to more pronounced symptoms.

Previous Exposure

Interestingly, repeated exposure to mosquito bites can lead to two opposing outcomes. Some individuals may develop an immunity over time, resulting in reduced reactions. Conversely, others may become more sensitive, experiencing increasingly severe reactions with each bite.

Genetic Factors

Genetic predisposition can play a role in how an individual reacts to mosquito bites. Some people may be genetically more susceptible to severe reactions or allergies.

Age and Health Status

Young children and individuals with compromised immune systems are more likely to experience severe reactions to mosquito bites. As the immune system develops and changes over time, reactions to bites may also evolve.

Effective Treatments for Mosquito Bites

While mosquito bites can be irritating, there are several effective ways to manage symptoms and promote faster healing:

Immediate Relief Measures

1. Apply rubbing alcohol to the bite area to reduce the histamine response and clear away mosquito saliva.
2. Use a cold compress or ice pack to reduce swelling and numb the area.
3. Apply calamine lotion or hydrocortisone cream to relieve itching.
4. Take an oral antihistamine to reduce overall allergic reactions.

Natural Remedies

Several natural remedies can provide relief from mosquito bites:

• Aloe vera gel: Known for its soothing and anti-inflammatory properties.
• Tea tree oil: Has antiseptic and anti-inflammatory effects (dilute before applying to skin).
• Baking soda paste: Can help neutralize the pH of the skin and reduce itching.
• Honey: Has antimicrobial properties and can soothe irritated skin.

When to Seek Medical Attention

While most mosquito bites can be treated at home, certain symptoms warrant medical attention:

• Signs of infection (increased redness, warmth, or pus)
• Fever or flu-like symptoms
• Severe swelling or pain
• Difficulty breathing or other signs of anaphylaxis

Prevention Strategies: Keeping Mosquitoes at Bay

Preventing mosquito bites is the most effective way to avoid allergic reactions. Here are some strategies to reduce your chances of being bitten:

Personal Protection

• Use EPA-registered insect repellents containing DEET, picaridin, IR3535, oil of lemon eucalyptus, para-menthane-diol, or 2-undecanone.
• Wear long-sleeved shirts and long pants when outdoors, especially during peak mosquito hours (dawn and dusk).
• Treat clothing and gear with permethrin or purchase permethrin-treated items.

Environmental Control

Reducing mosquito populations around your home can significantly decrease bite risks:

• Eliminate standing water where mosquitoes breed (e.g., in flower pots, birdbaths, and gutters).
• Use mosquito netting over strollers and when sleeping outdoors.
• Install or repair screens on windows and doors to keep mosquitoes out.

Natural Repellents

Some natural substances may help repel mosquitoes:

• Citronella oil
• Eucalyptus oil
• Peppermint oil
• Lemongrass oil

While these natural options may provide some protection, they are generally less effective and shorter-lasting than EPA-registered repellents.

Understanding Mosquito Attraction: Why Are Some People More Prone to Bites?

Have you ever wondered why mosquitoes seem to prefer certain individuals over others? Several factors can make a person more attractive to mosquitoes:

Carbon Dioxide Production

Mosquitoes are attracted to the carbon dioxide we exhale. Larger people and pregnant women, who typically produce more CO2, may be more attractive to mosquitoes.

Body Heat and Sweat

Mosquitoes can detect body heat and are drawn to warmer bodies. Additionally, the lactic acid, uric acid, and other substances in sweat can attract these insects.

Blood Type

Some studies suggest that mosquitoes may prefer certain blood types over others, with Type O being the most attractive.

Clothing Color

Mosquitoes are more attracted to dark colors, as they stand out against the horizon and retain heat more effectively.

Alcohol Consumption

Drinking alcohol can increase body temperature and ethanol excretion through sweat, potentially making you more attractive to mosquitoes.

Understanding these factors can help individuals take appropriate precautions, especially if they fall into a category that might be more attractive to mosquitoes.

The Global Impact of Mosquito-Borne Diseases

While mosquito bites are often seen as a mere nuisance in many parts of the world, it’s crucial to recognize the significant global health impact of mosquito-borne diseases. These tiny insects are vectors for numerous serious illnesses that affect millions of people annually.

Major Mosquito-Borne Diseases

• Malaria: Caused by Plasmodium parasites, malaria remains one of the deadliest mosquito-borne diseases, particularly in sub-Saharan Africa.
• Dengue Fever: A viral infection that can cause severe flu-like symptoms and, in some cases, lead to life-threatening complications.
• Zika Virus: Known for its potential to cause birth defects when contracted during pregnancy.
• West Nile Virus: Can lead to severe neurological problems in a small percentage of infected individuals.
• Chikungunya: Causes debilitating joint pain that can persist for months or even years.

Global Health Initiatives

Numerous global health organizations are working tirelessly to combat mosquito-borne diseases:

• The World Health Organization’s Global Vector Control Response aims to reduce the burden and threat of vector-borne diseases through effective locally adapted sustainable vector control.
• The Roll Back Malaria Partnership coordinates global action against malaria.
• The Gates Foundation funds research into innovative mosquito control methods, including genetic modification of mosquitoes.

Climate Change and Mosquito-Borne Diseases

Climate change is expected to significantly impact the spread of mosquito-borne diseases. As temperatures rise and rainfall patterns change, mosquito habitats may expand, potentially exposing new populations to these diseases. This underscores the importance of continued research, prevention efforts, and global cooperation in managing mosquito populations and the diseases they transmit.

By understanding the broader implications of mosquito bites beyond personal discomfort, we can better appreciate the importance of mosquito control efforts and support initiatives aimed at reducing the global burden of mosquito-borne diseases.

Mosquito Bite Allergy Symptoms – Mosquito Bite Reaction Meaning

This article was medically reviewed by Shonda Hawkins, MSN, a nurse practitioner and member of the Prevention Medical Review Board, on June 11 2019.

There’s nothing worse than coming home from a hike, camping trip, or barbecue and discovering a ton of itchy, painful mosquito bites speckling your skin. Even worse: Your friend or sibling who was with you the entire time has no bites at all. So, what gives?

Well, it helps to know how and why a mosquito bites you in the first place. Only females are out for blood, explains Joseph M. Conlon, an expert with The American Mosquito Control Association who worked as an entomologist for 25 years.

“Female mosquitoes imbibe blood as a protein source for egg development,” Conlon says. When the female mosquito “bites” you, she inserts the tip of her mouth into one of your blood vessels, injecting her saliva into your bloodstream. The saliva contains a protein that prevents your blood from clotting as she eats. (What a pleasant thought, right?)

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It’s these proteins, not the bite itself, that cause the swelling, redness, and itching that some—but not all—of us experience. It’s true: Seeing no reaction after a bite could mean you’re one of the lucky few who aren’t allergic to mosquito saliva, says Andrew Murphy, MD, a fellow at the American Academy of Allergy, Asthma & Immunology.

It also could mean you’ve developed an immunity to mosquito bites. “When a person has had repeated exposure to the mosquito allergen, her immune system can stop recognizing the allergen as a problem, and there is no reaction,” Dr. Murphy says.

However, many of us do have some type of allergy to these pesky bug bites—ranging from common, minor bumps to rare, severe reactions. Here are the symptoms to keep an eye out for and what you can do to find relief.

Minor mosquito bite allergy: Small red bump

What it looks like: round, white-ish bump, often with a small visible dot at the center; becomes red and firm after 1 or 2 days

What it means: This is the most common mosquito bite allergy and the reaction is more annoying than anything, says Jorge Parada, MD, medical director of the Infection Control Program at Loyola University Chicago and medical advisor for the National Pest Management Association. “This minor allergic reaction is in response to proteins in the mosquito’s saliva.”

Moderate mosquito bite allergy: Welts

What it looks like: slightly raised, smooth, flat-topped bumps that are usually more reddish than the surrounding skin

What it means: Some people are more sensitive to the mosquito’s proteins, explains Dr. Parada. This sensitivity causes them to react with larger welts instead of the traditional small bump. “However, some studies have found that the reaction is also a function of the mosquito’s feeding time,” he adds. “The longer the mosquito feeds, the more mosquito proteins are released, thereby increasing the chance of a visible reaction.”

Serious mosquito bite allergy: Hives and fever (aka skeeter syndrome)

What it looks like: welts accompanied by skin swelling, heat, redness, and itching or pain, along with a fever

What it means: You may have a reaction known as skeeter syndrome, a more extreme mosquito bite allergy. It can lead to excessive swelling of the bite area, as well as feeling hot and hard to the touch. Sometimes the bite area can even blister and ooze. While anyone can develop skeeter syndrome (even those with no prior extreme reaction to mosquito bites), Dr. Murphy says young children, patients with immune system disorders, and travelers exposed to new types of mosquitoes are at a higher risk.

Severe mosquito bite allergy: Anaphylaxis

What it looks like: hives, lip/tongue swelling, trouble breathing, wheezing, coughing

What it means: While anaphylaxis from mosquito bites is rare, it can be fatal. “Patients with anaphylaxis to mosquitoes will have the typical symptoms of a severe allergic reaction,” Dr. Murphy says. He mentions hives, lip or tongue swelling, trouble breathing, wheezing, coughing, and—in severe cases—passing out or death. “Treatment is the use of injectable epinephrine and seeking immediate medical attention,” he adds.

🚨 If you suspect a mosquito bite is causing serious symptoms like fever, excessive swelling, hives, and swollen lymph nodes, seek emergency help.

How to treat and prevent mosquito bites

If you do fall on the minor to moderate end of the spectrum, there are a few things you can do at home to help get rid of mosquito bites faster.

First, swabbing the bite area with rubbing alcohol can help reduce your body’s histamine response (the chemical produced by your immune system that causes allergic reactions) by clearing away the mosquito’s saliva, according to Jonathan Day, PhD, a mosquito researcher and professor of medical entomology at the University of Florida.

Dabbing your skin with ice, calamine lotion, or 1 percent hydrocortisone cream can also help tame inflammation, relieve itching, and overall soothe the skin. If that’s not doing the trick, popping an oral antihistamine, like Benadryl, can also turn off your body’s histamine response to reduce swelling and itching.

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More importantly, preventing mosquito bites in the first place should be your first priority. That way, you don’t have to worry about mosquito-borne diseases like Zika or West Nile viruses, or even chikungunya, malaria, and dengue fever if you’re traveling outside of the U.S.

Avoiding peak mosquito hours (dusk and dawn), investing in an outdoor fan to prevent them from flying near you, and applying insect repellent that contains ingredients like DEET, oil of lemon eucalyptus, IR3535, and picaridin can go a long way in keeping the bug bites at bay.

Additional reporting by Markham Heid

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Pictures, Causes, Symptoms, and Treatment

The initial contact of a bite may be painful. It’s often followed by an allergic reaction to venom deposited into your skin through the animal’s mouth or stinger. The appearance can vary.

Whether you’re in the water, on a mountain trail, or in your backyard, wildlife you encounter have ways of protecting themselves and their territory.

Insects, such as bees, ants, fleas, flies, mosquitoes, and wasps, and arachnids, such as spiders, ticks, and scorpions, may bite or sting if you get close. Most of these animals won’t bother you if you don’t bother them, but knowing what to look for is key.

Most bites and stings trigger nothing more than minor discomfort, but some encounters can be deadly, especially if you have severe allergies to the animal’s venom.

A severe allergic reaction can happen with any bug bite or sting, depending on the person. Venom allergies may cause a dangerous, severe allergic reaction in some people, resulting in swelling, generalized itching, and difficulty breathing.

Signs of an emergency

Anaphylaxis can be a life threatening emergency. If someone experiences signs of a severe allergic reaction, call 911 or your local emergency services. Anaphylaxis can cause symptoms, including rash, low pulse, and anaphylactic shock. This can be fatal if it isn’t treated immediately.

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Prevention is the best medicine, so knowing how to recognize and avoid biting and stinging insects or arachnids is the best way to stay safe.

The animals you should recognize and understand depend very much on where you live or where you’re visiting. Different regions of the United States are home to many of these creatures.

The season also matters. For example, mosquitoes, stinging bees, and wasps tend to come out in full force during the summer.

The form a bite takes depends on what type of animal bit you. Take a look at the photos below to help identify which animal may have caused your bug bite.

Warning: Graphic images ahead.

Mosquito bites

• A mosquito bite is a small, round, puffy bump that appears soon after you’ve been bitten.
• The bump will become red, hard, swollen, and itchy.
• You may have multiple bites in the same area.

Read full article on mosquito bites.

Fire ant stings

• Fire ants are small, aggressive, red or black venomous ants that bite and then deliver painful stings.
• Stings appear as swollen red spots that develop a blister on top.
• Stings burn, itch, and last up to a week.

Read full article on fire ant stings.

Flea bites

• Flea bites are usually located in clusters on the lower legs and feet.
• The itchy, red bumps are surrounded by a red halo.
• Symptoms begin immediately after you’re bitten.

Read full article on flea bites.

Bedbug bites

• The itchy rash is caused by an allergic reaction to the bedbug bite.
• The small rashes have red, swollen areas and dark red centers.
• Bites may appear in a line or grouped together, usually on areas of the body not covered by clothing, such as the hands, neck, or feet.
• There may be very itchy blisters or hives at the bite site.

Read full article on bedbug bites.

Fly bites

• Painful, itchy rashes are caused by an inflammatory reaction at the site of the fly bite.
• Though usually harmless, they may lead to severe allergic reactions or spread insect-borne diseases.
• Take precautions when traveling to endemic countries by wearing long-sleeve shirts and pants and by using bug spray.

Read full article on fly bites.

Lice bites

• Head lice, pubic lice (“crabs”), and body lice are different species of parasitic lice that affect humans.
• They feed on blood and cause an itchy immune reaction at the site of their bites.
• Adult lice are gray/tan six-legged insects about the size of a tiny sesame seed.
• Nits (eggs) and nymphs (baby lice) can only be seen as very tiny specks that may look like dandruff.

Read full article on lice.

Chigger bites

• Painful, itchy rashes may be caused by an immune response to the bites of tiny mite larvae.
• Bites appear as welts, blisters, pimples, or hives.
• Bites will generally appear in groups and are extremely itchy.
• Chigger bites may be grouped in skin folds or near areas where clothing fits tightly.
• Chiggers tend to jump from grass, so bites are usually on legs near the tops of socks.

Read full article on chigger bites.

Tick bites

• Bites can cause pain or swelling at the bite area.
• They may also lead to a rash, a burning sensation, blisters, or difficulty breathing.
• The tick often remains attached to the skin for a long time.
• Bites rarely appear in groups.
• Ticks can transfer diseases, including Lyme disease, babesiosis, and anaplasmosis.

Read full article on tick bites.

Scabies

• Symptoms caused by scabies mites may take 4 to 6 weeks to appear.
• The extremely itchy rash may be pimply, made up of tiny blisters, or scaly.
• They may cause raised, white, or flesh-toned lines.

Read full article on scabies.

Spider bites

Share on PinterestEzytyper and added inset by B Kimmel/GFDL or CC-BY-SA-3.0 from Wikimedia Commons

This condition is considered a medical emergency, and 911 or local emergency services should be contacted. Urgent care may be required.

• Most spiders don’t pose a threat to humans, and in such cases, their bites are harmless or mildly irritating like a bee sting.
• Dangerous spiders include the brown recluse, black widow, funnel web spider (Australia), and wandering spider (South America).
• A single raised papule, pustule, or wheal may appear at the site of the bite followed by redness and tenderness.
• The bite will appear as two small puncture marks.
• Severe allergic reactions to a spider bite may require medical attention.

Read full article on spider bites.

Brown recluse spider bite

• This is a shy, brown- or tan-colored spider with a violin-shaped patch and six paired eyes, two in the front and two sets of two on either side of the head.
• It likes to hide in quiet, dark places like closets and bookshelves and is native to the South and South Central regions of the United States.
• Nonaggressive, it will only bite humans if it’s being crushed between skin and a hard surface.
• Redness appears with a central, white blister at the site of the bite.
• Moderate to severe pain and itching at the site of the bite occurs 2 to 8 hours after the spider has injected its venom.
• Rare complications include fever, body aches, nausea, vomiting, hemolytic anemia, rhabdomyolysis, and kidney failure.

Read full article on brown recluse spider bites.

Black widow spider bite

Share on Pinterest© The Author(s) 2020. Published by Oxford University Press on behalf of the European Society of Cardiology/NCBI

This condition is considered a medical emergency, and 911 or local emergency services should be contacted. Urgent care may be required.

• This spider is plump, black, and shiny, with an hourglass-shaped red mark on its abdomen.
• It’s nonaggressive and will only bite if it’s being crushed.
• Bites cause muscle pain and spasms in the arms, legs, abdomen, and back.
• Tremor, sweating, weakness, chills, nausea, vomiting, and headache are other symptoms.
• The bite area is red with a white center.

Read full article on black widow spider bites.

Hobo spider bite

• The venom of this common household spider isn’t considered toxic to humans.
• Bites are generally harmless and cause only minor pain, swelling, and sometimes muscle twitches.
• A single red area appears with a tender central nodule.
• Itching, burning, or stinging may occur at the site of the bite.

Read full article on hobo spider bites.

Wolf spider bite

• This large (up to 2 inches long), fuzzy, gray/brown spider is native to many parts of the United States.
• Nonaggressive, it will bite if it feels threatened.
• A tender, itchy red bump appears that heals in 7 to 10 days.

Read full article on wolf spider bites.

Horsefly bites

• These large (1-inch long) blood-sucking flies are most active in the daylight hours.
• An instant, sharp burning sensation occurs when a horsefly bites.
• Itchiness, redness, swelling, and bruising may also occur at the bite location.

Read full article on horsefly bites.

Bee stings

• Pain, redness, swelling, or itching occurs at the site of the sting.
• A white spot appears where the stinger punctured the skin.
• Unlike bumblebees and carpenter bees, honeybees can only sting once due to their barbed stinger that can remain in the skin.

Read full article on bee sting allergy.

Yellow jacket stings

• These thin wasps have black and yellow stripes and long dark wings.
• Aggressive, a yellow jacket may sting multiple times.
• Swelling, tenderness, itchiness, or redness may occur near the area that’s been stung.

Read full article on yellow jacket stings.

Wasp stings

• Sharp pain, redness, swelling, and itching or burning occurs at the sting site.
• A raised welt appears around the sting site.
• Wasps can be aggressive and are capable of stinging multiple times.

Read full article on wasp stings.

Scorpion stings

• Scorpions are eight-legged arachnids with large pincers and long, segmented, stinger-tipped tails carried in a forward curve over their backs.
• Many species with variable levels of toxicity can be found all over the world.
• Intense pain, tingling, numbness, and swelling occur around the sting.
• Rare symptoms include breathing difficulties, muscle twitching, drooling, sweating, nausea, vomiting, an increased heart rate, restlessness, and excitability.
• Severe symptoms are more likely in infants and children than adults.

Read full article on scorpion stings.

Puss caterpillar stings

• Puss caterpillars may also be known as asp caterpillars, fire caterpillars, woolly slugs, or opossum bugs, and are the larvae of the flannel moth.
• They have venomous barbs on their bodies.
• They typically reside in the Southeast United States but have been found as far west as Florida and Texas.
• A string can cause skin irritation and itchiness, severe pain, and headache.

Kissing bug bites

Share on PinterestHorizons WWP / Alamy Stock Photo & Curtis-Robles et al., CC BY 4.0, via Wikimedia Commons

• Triatomine bugs, also called kissing bugs, tend to bite people on the face or near the mouth.
• These bugs tend to reside in Mexico, Central America, South America, and parts of the United States.
• They carry a parasite called Trypanosoma cruzi and can T. cruzi infection and Chagas disease.
• While there are different varieties of kissing bugs, they typically have a cone-shaped head and a long, oval-shaped body with antennae and six legs. They can be light brown to black in color and may have yellow, red, or tan markings.
• Bite reactions may include mild itching, redness, and swelling. With a T. cruzi infection, a small hard area may form at the bite site.

Read full article on kissing bug bites.

Deer fly bites

Share on PinterestBruce Marlin, CC BY-SA 3.0 , via Wikimedia Commons & juhat/Istock

• Deer flies have small, round heads, brownish-black bands on their wings, and gold or green eyes.
• Their bites can be painful and cause bumps or welts.
• Their bites can sometimes cause a rare bacterial disease known as rabbit fever (tularemia) that may cause skin ulcers, fever, and headache.

Read full article on fly bites.

Here are some bugs that can be more dangerous than others.

Biting insects, arachnids, and other bugs

Many bugs bite, but only a few do so intentionally. Most bites are relatively harmless, leaving just an itchy patch of skin behind. But some bites can carry disease. Deer ticks, for example, typically carry Lyme disease.

Intentional biters include:

• ticks
• chigger mites
• scabies mites
• bedbugs
• fleas
• head lice
• pubic lice
• horseflies
• black flies
• mosquitoes
• pus caterpillars
• kissing bugs
• deer flies

Many larger insects and other bugs won’t seek you out but will bite if handled.

Spiders

Some spiders have venomous fangs. Venomous spiders found in the United States include:

• brown recluse spiders
• black widow spiders
• mouse spiders
• black house spiders

Stinging insects

Insects will sting humans only to defend against a perceived threat. Typically, a sting from a bee or stinging ant will be accompanied by a small amount of venom.

When injected into your skin, the venom causes most of the itching and pain associated with the sting. It can also cause an allergic reaction.

Common stinging insects in the United States include:

• bees
• paper wasps (hornets)
• yellow jackets
• wasps
• fire ants

Scorpions

Scorpions have a reputation for stinging. Many species have barbed tails equipped with venom, some strong enough to kill a human.

The most venomous species of scorpion native to the United States is the Arizona bark scorpion.

The venom injected into your body from the bite or sting of an insect or arachnid will cause your immune system to respond. Often, your body’s immediate response will include redness and swelling at the bite or sting site.

Minor delayed reactions include itching and soreness.

If you’re very sensitive to an animal’s venom, bites and stings can cause a potentially fatal condition called anaphylactic shock. This can cause the throat to tighten and make breathing difficult or cause low blood pressure.

Anaphylactic shock is considered an emergency, and 911 or local emergency services should be contacted.

Some bites and stings may cause illnesses when venom contains infectious agents.

Anyone can be bitten or stung by an insect or arachnid, and bites and stings are very common. You’re at greater risk if you spend a lot of time outdoors, especially in rural or wooded locations.

Children and older adults may have more severe reactions to bites and stings.

If you’re bitten or stung, you may see or feel the animal on your skin during the attack. Some people don’t notice the animal and may not be aware of a bite or sting until one or more of the following symptoms emerge:

• swelling
• redness or rash
• pain in the affected area or in the muscles
• itching
• heat on and around the site of the bite or sting
• numbness or tingling in the affected area

Symptoms of a severe reaction requiring immediate medical treatment include:

• fever
• difficulty breathing
• nausea or vomiting
• muscle spasms
• rapid heart rate
• swelling of the lips and throat
• confusion
• loss of consciousness

If you feel ill or experience flu-like symptoms in the days following an insect or arachnid bite, see a doctor for tests to rule out infections or diseases you may have contracted from the animal.

While not every insect bite or sting can cause an infection or disease, some insects can transmit diseases this way.

These insects and the diseases they may transmit can include:

• Mosquitos: insect-borne diseases such as malaria, West Nile virus, dengue fever, yellow fever, and several viruses that cause encephalitis
• Fleas: bacterial infection, rarely
• Flies: insect-borne diseases
• Sand flies: leishmaniasis, a parasitic disease, though cases occur tropical and subtropical environments
• Lice: epidemic typhus, Bartonella quintana infection, and epidemic relapsing fever
• Chiggers: scrub typhus, though most cases occur in Southeast Asia, Indonesia, China, Japan, India, and northern Australia
• Ticks: tick-borne diseases such as Lyme disease, Rocky Mountain spotted fever, Colorado tick fever, tularemia, ehrlichiosis
• Kissing bugs: Chagas disease
• Deer flies: tularemia

Many people are aware they’ve been bitten or stung because they see the insect or arachnid shortly after the attack.

Although you shouldn’t further provoke an attacking insect or arachnid, try to preserve the animal if it dies following the bite or sting. Its identity may help a doctor properly diagnose your symptoms.

This is especially important for a spider bite, as some species have dangerously potent venom.

The majority of bites and stings can be treated at home, especially if your reaction is mild.

To treat a bite or sting:

• Remove the stinger if it’s lodged in your skin.
• Wash the affected area.
• Apply an ice pack to reduce pain and swelling.

Topical anti-itch creams, oral pain relievers, and antihistamines may be used to combat uncomfortable symptoms.

You may also want to consider applying a thin paste of baking soda and water to the sting to calm the itching.

Call 911 or your local emergency services number immediately if symptoms of a severe reaction are present.

First aid instructions while waiting for paramedics to arrive include:

• loosening the victim’s clothing
• laying them on their side
• performing CPR if breathing or the heartbeat stops

If you believe a spider of the black widow or brown recluse variety has bitten you, contact 911 or local emergency services immediately even if symptoms seem minor or haven’t emerged.

Scorpion bites also should be treated as an emergency, and 911 or local emergency services should be contacted, regardless of symptoms.

Most bites and stings heal by themselves after several days of mild discomfort.

Monitor the affected site for signs of infection. Contact a doctor if the wound appears to be getting worse or hasn’t healed after several weeks.

Bites and stings that cause severe reactions can be fatal if they aren’t treated immediately.

Once you’ve experienced a severe allergic reaction, a doctor will likely prescribe an epinephrine auto-injector. Epinephrine is a hormone that can prevent anaphylactic shock.

Carry the auto-injector with you at all times to reverse the reaction immediately following a bite or sting.

If you need help finding a primary care doctor, then check out our FindCare tool here.

Use caution when near nests or hives containing aggressive insects. Hire professionals who have the proper safety equipment to remove a nest or hive.

When spending time outside, take preventive measures, such as:

• wearing hats and clothing that provide full coverage
• wearing neutral colors and avoiding floral patterns
• avoiding perfume and scented lotion
• keeping food and drinks covered
• using citronella or insect repellent
• using permethrin on clothing to prevent black-legged tick bites

Article Resources

• Ellwanger JH, et al. (2021). Variability in human attractiveness to mosquitoes. https://www.sciencedirect.com/science/article/pii/S2667114X21000522
• Bites and stings: Insects. (n.d.). https://www.hopkinsmedicine.org/health/conditions-and-diseases/bites-and-stings-insects
• Body lice: Disease. (2022). https://www.cdc.gov/parasites/lice/body/disease.html
• Goldman BS, et al. (2022). Caterpillar and moth bites. https://www.ncbi.nlm.nih.gov/books/NBK539851/
• McKeown N, et al. (2014). Verified spider bites in Oregon (USA) with the intent to assess hobo spider venom toxicity. https://www.sciencedirect.com/science/article/abs/pii/S0041010114000920
• Parasites – American trypanosomiasis (also known as Chagas disease). (2022). https://www.cdc.gov/parasites/chagas/
• Powers J, et al. (2022). Insect bites. https://www.ncbi.nlm.nih.gov/books/NBK537235/
• Preventing tick bites. (2020). https://www.cdc.gov/ticks/avoid/on_people.html
• Typhus fevers. (2020). https://www.cdc.gov/typhus/index.html

Insect bite prevention

No summer is complete without insect bites. This is not only unpleasant, but sometimes dangerous to health.

The immune system of each person reacts to bites in different ways: from swelling, itching and pain to anaphylaxis. An anaphylactic reaction can develop after a bite from any insect. Fortunately, this is rare, but people who have experienced any kind of allergic reaction before should be especially vigilant.

An anaphylactic reaction occurs at lightning speed. A person feels weak, then symptoms quickly increase: difficulty breathing, increased heart rate, loss of consciousness.

If an anaphylactic reaction occurs, emergency medical attention is needed, as this condition is life-threatening.

A milder allergic reaction to insect bites manifests itself in the form of itching, inflammation of the bite site. When there are many such bites, it causes great discomfort. Often there are complications – the addition of a secondary infection.

5 common insect bites in summer

Mosquito bites are accompanied by severe unbearable itching – this is a reaction to the proteins contained in the saliva of the insect.

In some tropical countries, mosquito bites can transmit diseases such as malaria, Zika fever, Dengue fever, yellow fever.

Wasps, bees and hornets have stingers for self-defense. The sting contains a poisonous substance that enters the bite site, causing severe pain and burning. At the site of the bite, swelling, inflammation, redness and itching may appear. The most dangerous complication of such bites is anaphylaxis. The stings of bees, wasps, bumblebees and hornets are very dangerous for children.

Horseflies attack in hot stuffy weather. Their bite is quite painful, it can cause a sharp burning sensation. Often there is a feeling of itching, inflammation and swelling in the bite area. There may even be a bruise.

There are about 4,000 species of biting midges . The smallest of the flies that attack humans can range in size from 1 to 3 mm. Despite their tiny size, midge bites can be irritating and even cause local pain.

Flea bites leave small sores on the skin, usually several, next to each other, often on the ankles and legs.

First Aid

• apply cold
• remove tip
• clean with antiseptic solution
• do not scratch
• if necessary, drink an antihistamine (recommended by a doctor, observing the age dosage)

Seek medical attention immediately, if you have had a severe allergic reaction to an insect sting in the past, or if you experience one or more of the following symptoms:

• sudden urticaria
• swelling of the face
• labored breathing
• dizziness
• fainting

Basic precautions for preventing insect bites

Remain calm and walk away slowly if there are wasps, hornets or bees nearby – do not wave your arms and do not try to drive them away.

Wear closed clothing, do not walk barefoot on the grass.

Apply insect repellant to exposed skin or clothing as directed – repellants containing 50% DEET (diethyltoluamide) are most effective.

Avoid using strong perfumes, they can attract insects.

Be careful of flowering plants, trash, standing water, and open areas where food is served.

Avoid camping near bodies of water, do not keep containers filled with water in summer cottages – mosquitoes and horseflies are usually found near water.

In the evening, do not open the windows wide open if they are not equipped with a mosquito net.

It is also recommended that you take extra precautions if you are traveling to a part of the world where there is a risk of serious insect-borne diseases.

Let insects distract you from summer joys as little as possible this year!

The best remedies for itching after mosquito bites and other insects – July 6, 2021

Mosquitoes are guided by body temperature – therefore, people with superficially located capillaries become their favorites

org/Person”> Photo: Gustavo Zyryanov / NGS.RU

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Bites insects are common in the summer, especially if you spend the weekend outside the city. At the same time, they cause a lot of discomfort, and sometimes they can be really dangerous – even if we are talking about ordinary bees and mosquitoes. In the regular column “What hurts you?” today we are figuring out together with doctors how the bites of different insects differ, why you can’t scratch them and how to relieve itching after a bite.

It is possible to divide insects (by adding some arthropods to them) into two groups: stinging and blood-sucking (there will still be moths and butterflies that do not sting or bite). The first group includes bees, bumblebees, hornets, ants, the second group includes mosquitoes, fleas, horseflies, ticks, bedbugs, lice. Since stinging insects attack for self-defense, and blood-sucking ones for food, their mechanisms are different – when stinging, a person interacts with poison, and when bitten, with saliva, which contains histamine-like substances. They help slow down blood clotting and, irritating the epithelial cells, provoke a local allergic reaction, swelling appears, which can subsequently be accompanied by itching.

— Allergic reactions can be either local or systemic. Most often, these are skin rashes, which are very diverse: papular, hemorrhagic, urticarial (in the form of blisters), says Ekaterina Skvortsova, general practitioner, therapist at the Medsi clinic. – Depending on the type of insect, there are features: for example, when bitten by midges, it acquires the character of erysipelas, redness, swelling without temperature. When bitten by a mosquito – itchy nodular rash.

The first thing to remember is that you must not scratch the bite. And this rule is not taken from the ceiling: the fact is that when combing, pathogenic microflora can get there and then suppuration joins. By the way, for the same reason, you can not apply grass to the bite site, even plantain.

– It is necessary to treat the bite site with disinfectants: rinse with running water with baby or laundry soap, you can slightly salted water. If there are disinfectant solutions on hand, such as furacilin solution, treat them. You can use alcohol-containing medicinal tinctures, diluted with water one to one, advises Dr. Skvortsova.

To relieve discomfort, you can apply an ice cube or just something cold to the bite site – this soothes and relieves swelling. To get rid of itching and redness after mosquito bites, you can use pharmaceutical products – creams and ointments based on antihistamines (for example, Fenistil-gel, Fenidin, Dimestin, Dimetinden-Akrikhin).

– If you see that redness has begun to appear not even at the site of the bite, then the antihistamine will need to be taken orally. Severe allergies to non-stinging insects rarely occur, but it can happen – for example, such a reaction can occur to a horsefly bite, – says Ivan Skorokhodov, an allergist-immunologist at the UMMC-Health Medical Center.

All other folk ways to relieve itching and swelling doctor rejects. For example, he does not recommend using the Zvezdochka balm for this – it has a local irritating effect, this will lead to even greater vasodilation and increased edema.

Doctors call it not a bite, but a sting. Stinging insects are dangerous in that a severe systemic allergic reaction can develop from their poison – up to anaphylactic shock. It can manifest itself in the first three hours, so it is important at this time to observe the state of the stung. The reason for calling an ambulance may be difficult or wheezing breathing, speech problems, choking, too much (more than 5 cm in diameter) swelling from a bite in the face or tongue, red spots or hives outside the bite site, nausea, abdominal pain, diarrhea , vomiting, rapid pulse, anxiety, dizziness, severe weakness; the condition is deteriorating rapidly. If an insect has stung from the inside of the throat (this happens if you swallow a bee or wasp, for example, with a drink), a child under five years of age has suffered, or the stung person has severe chronic diseases, an ambulance should be called immediately. Ekaterina Skvortsova says that if the previous time there was already an acute allergic reaction to a bee sting, it will get worse with each subsequent time.