Bites on thigh. Everything You Need to Know About Mite and Flea Bites

28.09.202309.07.2023 by alexxlab

What are mites and fleas. How to identify mite and flea bites. Can mites and fleas be harmful to your health. How to get rid of mites in your household.

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What are Mites, and Do They Bother Humans?

Mites are arthropods, not insects, and are close cousins with spiders and ticks. Most types of mites feed on other insects or on dead plant and animal material. Dust mites, for example, feed mostly on dead skin cells. However, there are a few types that bite or affect people, including chiggers, scabies mites, rat mites, bird mites, and northern fowl mites.

Despite what you may have heard or read online, home mite infestations are fairly rare and tend to be much less of an issue than people assume. “A lot of the mite stuff on the internet makes it sound like [a mite infestation is] the end of the world, but it’s not,” says Mike Merchant, PhD, a former professor of entomology at Texas A&M University in Dallas.

Can Mites Be Harmful to Your Health?

Mite bites can cause skin lumps and rashes and, occasionally, more serious reactions. Among outdoor mites, the only type that frequently bites people is the chigger. The word “chigger” applies to a particular species of mite that bites during its larval stage of development, and their bite produces an intensely itchy red welt.

When it comes to indoor mites that bite or cause health issues, most spring from animal nests. “Some mites will infest the nests of birds and rats and mice, and when they become abundant, they’ll leave that site and sometimes wander into the house and bite people,” Merchant explains. In most cases, the bites of these mites cause an itchy skin rash, which may feature small lumps or pimples.

The skin might be very itchy or red for a few days, but then that will taper off. Ice and anti-itch creams like hydrocortisone can help control the swelling and itching, and the symptoms should resolve within a week. Nearly all species of biting house mites cannot live on human beings, and so they don’t “infest people,” Merchant adds.

What is Scabies?

The one outlier is scabies. These mites infest a person’s skin in order to lay eggs and feed, and are usually only passed by direct person-to-person contact. Like other mites, scabies tend to cause an itchy, pimply red rash. But unlike other mites, those rashes will continue to appear unless the person gets medical treatment, usually a prescription-only skin cream or lotion designed to kill scabies.

How Do Dust Mites Affect Allergies?

Dust mites can cause allergies in some people, but these tend to be of the mild, seasonal allergy variety — stuff like a runny nose, sneezing, and itchy eyes. Over-the-counter and prescription allergy meds can help quell dust mite allergies.

How to Get Rid of Mites in Your Household

You don’t need a crazy whole-house treatment or fumigation. You just need to remove the animals and animal nests that are bringing mites into your home, Merchant says. “Everybody always wants a spray to solve these types of mite problems, but the real solution is getting rid of any animals nesting in your home, and animal-proofing your home.” Basically, call in a home pest pro.

When it comes to scabies mites, in addition to getting medical treatment, you can take steps to eliminate the mites from your household. Scabies mites don’t survive very long when they’re not on human skin. Vacuum your home the day you start treatment and decontaminate your bedding, clothing, and towels by washing these items in hot water and drying on high heat. You can also dry-clean or seal these articles in a plastic bag for at least 72 hours.

As for dust mites, it’s almost impossible to get rid of them all. But frequent home cleaning and dusting, installing HEPA air filters, and buying bedding that can be washed in hot water and that resists dust accumulation can limit allergic reactions.

What Are Fleas, and What Do Flea Bites Look Like?

Fleas are blood-sucking insects that live on mammals — often dogs, cats, or other furry pets. Fleas are brown and wingless, and while they’re small, usually around an eighth of an inch, they’re big enough to see or even feel with your hand.

While they prefer animals to humans, fleas can migrate off pets and onto their owner’s skin. “Usually flea bites are on the lower legs because the fleas get into the carpet and then jump up as we’re walking past,” Merchant explains. Flea bites produce small red bumps that may be itchy and that tend to appear in groups of three or more. Again, ice and hydrocortisone can help relieve symptoms, which tend to be short-lived — a week or less.

Everything You Need to Know About Mite and Flea Bites

What Bit Me? Spot These 12 Bug Bites

What Are Mites, and Do They Bother Humans?

Mites are arthropods, not insects, and are close cousins with spiders and ticks. (1) Most types of mites feed on other insects or on dead plant and animal material. (Dust mites, for example, feed mostly on dead skin cells.)

But there are a few types that bite or affect people: (2,3)

Chiggers
Scabies
Rat mites
Bird mites
Northern fowl mites

Despite what you may have heard or read online, home mite infestations are fairly rare and tend to be much less of an issue than people assume, says Mike Merchant, PhD, a former professor of entomology at Texas A&M University in Dallas. “A lot of the mite stuff on the internet makes it sound like [a mite infestation is] the end of the world, but it’s not,” he says.

Can Mites Be Harmful to Your Health?

Mite bites can cause skin lumps and rashes and, occasionally, more serious reactions, Dr. Merchant says.

Among outdoor mites, the only type that frequently bites people is the chigger. The word “chigger” applies to a particular species of mite that bites during its larval stage of development, and their bite produces an intensely itchy red welt, Merchant explains. “There are not too many other mite problems outdoors,” he adds.

RELATED: Everything You Need to Know About Chigger Bites

When it comes to indoor mites that bite or cause health issues, Merchant says most spring from animal nests. “Some mites will infest the nests of birds and rats and mice, and when they become abundant, they’ll leave that site and sometimes wander into the house and bite people,” he explains. In most cases, the bites of these mites cause an itchy skin rash, which may feature small lumps or pimples.

“The skin might be very itchy or red for a few days, but then that will taper off,” Merchant says of mite bites. Ice and anti-itch creams like hydrocortisone can help control the swelling and itching. But those symptoms should resolve within a week, he says. (Nearly all species of biting house mites cannot live on human beings, and so they don’t “infest people,” he adds.)

There is one outlier: scabies. These mites infest a person’s skin in order to lay eggs and feed, and are usually only passed by direct person-to-person contact. (4) Like other mites, scabies tend to cause an itchy, pimply red rash. But unlike other mites, those rashes will continue to appear unless the person gets medical treatment, usually a prescription-only skin cream or lotion designed to kill scabies.

Dust mites can cause allergies in some people, but these tend to be of the mild, seasonal allergy variety — stuff like a runny nose, sneezing, and itchy eyes. (5) Over-the-counter and prescription allergy meds can help quell dust mite allergies.

RELATED: Everything You Need to Know About Allergies

How to Get Rid of Mites in Your Household

The exception here, again, is the scabies mite; in addition to getting medical treatment, you can take steps to eliminate the mites from your household. Scabies mites don’t survive very long when they’re not on human skin. Vacuum your home the day you start treatment and decontaminate your bedding, clothing, and towels by washing these items in hot water and drying on high heat. You can also dry-clean or seal these articles in a plastic bag for at least 72 hours.

When it comes to dust mites, on the other hand, it’s almost impossible to get rid of them all. But frequent home cleaning and dusting, installing HEPA air filters, and buying bedding that can be washed in hot water and that resists dust accumulation can limit allergic reactions.

What Are Fleas, and What Do Flea Bites Look Like?

Fleas are blood-sucking insects that live on mammals — often dogs, cats, or other furry pets. (6) Fleas are brown and wingless. And while they’re small, usually around an eighth of an inch, they’re big enough to see or even feel with your hand, Merchant says.

What does a flea bite look like? Like many other types of insect bites, flea bites produce small red bumps that may be itchy and that tend to appear in groups of three or more. Again, ice and hydrocortisone can help relieve symptoms, which tend to be short-lived — a week or less.

More Serious Health Complications Can Arise if You Have Mites or Fleas

Like all biting or stinging insects, mites and fleas can occasionally cause serious allergic reactions, including problems breathing or a swollen limb or throat. Those symptoms warrant a trip to the emergency room.

Also, anything that causes itchy skin or open sores can allow in bacteria, which could lead to a secondary infection. (7) If you notice swelling, pain, or a mite or flea bite that seems to be getting worse after a day or two, or if you have a fever or other flu-like symptoms, talk to a doctor. Those could all be signs of a bacterial infection.

Finally, both fleas and mites can transmit some potentially serious diseases to humans — namely types of typhus and spotted fever — though these transmissions are very rare. Symptoms include headaches, fever, rashes, and delirium. (8)

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Tips for How to Avoid Getting Mosquito Bites in the First Place

To minimize your bite risk, try to stay indoors at dawn and dusk — times when humidity often peaks. “The higher the humidity, the better for mosquitoes, so dawn and dusk are times when they tend to be active,” Day says.

He explains that mosquitoes are fragile insects, and their bodies dry out quickly if they’re exposed to arid conditions or extended stretches of bright sunlight (which is another reason they prefer hunting at dawn and dusk, as opposed to midday). They’re also weak fliers, he says, so any kind of breeze or fan-generated wind tends to keep them at bay. If you can find a place that’s exposed to wind, or you have a strong fan handy, both can prevent mosquitoes from biting you.

Long pants and shirtsleeves — especially tightly woven synthetic fabrics such as the types used in so-called athleisure garments — tend to keep mosquitoes off your skin. Repellents also work well, Day says. The CDC suggests looking for products that contain DEET, picaridin, IR3535, and oil of lemon eucalyptus, or p-menthane-3,8-diol (PMD). (6) Apply these products to your ankles, wrists, forehead, elbows, and all the other knobby, bony places where the blood is up near the surface of the skin. Mosquitoes love to feast at these sites.

Also good to keep in mind: Mosquitoes are attracted to both the carbon dioxide humans exhale and the natural odors our bodies produce — stuff like sweat and foot odor. If you’ve been exercising, you’re likely to be both sweaty and producing higher amounts of carbon dioxide. Better to cool off and shower up indoors before heading outside. (7)

Follow all these precautions, and you can largely dodge mosquito bites all summer long.