What is considered a high fever in adults and children. How to treat fever at home. When to seek medical attention for a fever. What causes fevers and accompanying symptoms.

Understanding Fever: The Body’s Natural Defense Mechanism

Fever is a common physiological response that plays a crucial role in the body’s fight against infections. It occurs when the body’s temperature rises above its normal range, typically as a defense mechanism against invading pathogens such as viruses or bacteria. But how exactly does fever help combat these invaders?

The elevated body temperature during a fever serves several purposes:

• It enhances the immune system’s response, making it more effective at fighting off infections.
• The higher temperature creates an environment that is less hospitable for many pathogens, potentially slowing their growth and reproduction.
• It stimulates the production of white blood cells and antibodies, which are essential components of the immune response.

While fever can be uncomfortable, it’s important to recognize that it’s often a sign that your body is actively working to overcome an illness.

Defining Fever: What Temperature Constitutes a Fever in Adults?

Understanding what constitutes a fever is crucial for proper health management. In adults, a body temperature of 100.4°F (38°C) or higher is generally considered a fever. However, it’s important to note that “normal” body temperature can vary from person to person and fluctuate throughout the day.

The average body temperature is often cited as 98.6°F (37°C), but this can range from 97°F (36.1°C) to 99°F (37.2°C) and still be considered normal. Body temperature tends to be lower in the morning and higher in the late afternoon and evening. Factors such as physical activity, eating, and even the menstrual cycle can influence body temperature.

To provide a clearer understanding, fevers in adults can be categorized into different levels of severity:

• Low-grade fever: 99.1°F to 100.4°F (37.3°C to 38.0°C)
• Moderate-grade fever: 100.6°F to 102.2°F (38.1°C to 39.0°C)
• High-grade fever: 102.4°F to 105.8°F (39.1°C to 41°C)

Is a high fever always cause for concern? Not necessarily. The severity of a fever doesn’t always correlate directly with the seriousness of the underlying condition. However, very high fevers can be dangerous and may require medical attention.

Recognizing When a Fever Requires Medical Attention

While most fevers are not inherently dangerous, there are certain situations where medical intervention becomes necessary. Understanding these scenarios can help you make informed decisions about seeking medical care.

When should you call a doctor for a fever? Here are some guidelines:

• If your fever exceeds 104°F (40°C)
• If the fever persists for more than three days
• If you have a chronic medical condition or a weakened immune system
• If you’ve recently traveled to a region with endemic infectious diseases

Additionally, seek immediate medical attention if your fever is accompanied by any of these symptoms:

• Seizures or loss of consciousness
• Confusion or altered mental state
• Severe headache, especially with a stiff neck
• Difficulty breathing or chest pain
• Severe abdominal pain
• Unusual skin rash, especially if it’s rapidly spreading
• Signs of dehydration (dry mouth, decreased urination, dizziness)

Remember, these guidelines apply to adults. Children, especially infants and toddlers, may require different considerations when it comes to fever management.

Common Causes of Fever in Adults

Fevers can arise from various causes, with infections being the most common. Understanding the potential origins of a fever can help in determining the appropriate course of action and treatment.

What are the most frequent causes of fever in adults?

• Viral infections: Including influenza, common cold, COVID-19, and other respiratory viruses
• Bacterial infections: Such as strep throat, urinary tract infections, or pneumonia
• Parasitic infections: Less common in developed countries but can occur, especially after travel
• Inflammatory conditions: Rheumatoid arthritis, lupus, and other autoimmune disorders can cause fever
• Medications: Some drugs can induce fever as a side effect
• Vaccines: Temporary fever can occur as the body builds immunity
• Heat exhaustion or heatstroke: Prolonged exposure to high temperatures can elevate body temperature
• Certain cancers: Some types of cancer, particularly blood cancers, can cause fever

It’s important to note that fever is a symptom, not a disease itself. Identifying the underlying cause is crucial for proper treatment.

Recognizing Accompanying Symptoms

Fevers often don’t occur in isolation. Accompanying symptoms can provide valuable clues about the underlying cause of the fever. Common symptoms that may accompany a fever include:

• Chills and sweating
• Headache and body aches
• Fatigue and weakness
• Loss of appetite
• Dehydration
• Skin rashes
• Cough or sore throat (in respiratory infections)
• Nausea, vomiting, or diarrhea (in gastrointestinal infections)

How can these symptoms help in diagnosing the cause of a fever? The combination of fever with specific symptoms can often point to particular conditions. For instance, fever with a sore throat and swollen lymph nodes might suggest strep throat, while fever with cough and shortness of breath could indicate a respiratory infection.

Diagnosing the Underlying Cause of Fever

When you visit a healthcare provider with a fever, they will typically conduct a thorough examination to determine the underlying cause. This process often involves a combination of medical history review, physical examination, and potentially laboratory tests or imaging studies.

What questions might a doctor ask when diagnosing the cause of a fever?

• When did the fever start, and how long has it lasted?
• Have you noticed any patterns in the fever (e.g., higher at certain times of day)?
• What other symptoms are you experiencing?
• Have you traveled recently, especially to areas with known infectious disease outbreaks?
• Have you started any new medications or had any recent vaccinations?
• Have you been in contact with anyone who’s been ill?
• Do you have any chronic medical conditions?

Depending on your symptoms and medical history, your doctor may order additional tests such as:

• Blood tests: To check for signs of infection or inflammation
• Urine tests: To check for urinary tract infections
• Throat swabs: To test for strep throat or other infections
• Chest X-rays: If a respiratory infection is suspected
• Blood cultures: To check for bacteria in the bloodstream

These diagnostic tools help healthcare providers pinpoint the cause of the fever and determine the most appropriate treatment plan.

Effective Home Remedies for Managing Fever

While high fevers may require medical attention, many low to moderate fevers can be managed effectively at home. Here are some strategies to help alleviate discomfort and support your body’s natural healing process:

1. Stay hydrated: Drink plenty of fluids, including water, clear broths, and electrolyte solutions. Fever can lead to increased fluid loss through sweating, so maintaining hydration is crucial.
2. Rest: Your body needs energy to fight off the infection causing the fever. Get plenty of sleep and avoid strenuous activities.
3. Dress appropriately: Wear light, breathable clothing. If you’re feeling chilled, use a light blanket rather than bundling up heavily.
4. Create a comfortable environment: Keep your room at a moderate temperature, not too hot or cold.
5. Use over-the-counter medications: Acetaminophen, ibuprofen, or aspirin can help reduce fever and alleviate associated discomfort. Always follow dosage instructions carefully.
6. Apply cool compresses: Place a cool, damp washcloth on your forehead or wrists to help bring down body temperature.
7. Take a lukewarm bath: This can help cool the body, but avoid cold baths as they can cause shivering, which can raise body temperature.
8. Eat light, easily digestible foods: If you have an appetite, opt for foods that are easy on the stomach.

Remember, the goal isn’t necessarily to eliminate the fever entirely, as it plays a role in fighting infection. Instead, focus on managing symptoms and supporting your body’s natural healing processes.

Fever in Special Populations: Children, Elderly, and Immunocompromised Individuals

While the general principles of fever management apply broadly, certain populations require special considerations when it comes to fever.

Fever in Children

Children often run higher fevers than adults, and their temperature thresholds for concern are different. For children, fever is typically defined as:

• Rectal temperature above 100.4°F (38°C) in babies and toddlers
• Oral temperature above 100°F (37.8°C) in older children

When should you seek medical attention for a child with fever?

• For infants under 3 months: Any fever warrants immediate medical attention
• For children 3-6 months: Fever above 102°F (38.9°C)
• For children 6 months to 2 years: Fever lasting more than 24 hours
• For children over 2 years: Fever lasting more than 3 days or accompanied by concerning symptoms

Fever in the Elderly

Older adults may not always develop fever in response to infections due to age-related changes in the immune system. When they do develop fevers, they’re often lower than in younger adults. However, even a slight fever in an elderly person can indicate a serious infection and should be evaluated by a healthcare provider.

Fever in Immunocompromised Individuals

People with weakened immune systems, such as those undergoing chemotherapy or with HIV/AIDS, are at higher risk for severe infections. Any fever in an immunocompromised individual should be taken seriously and evaluated promptly by a healthcare provider.

For these special populations, it’s crucial to work closely with healthcare providers to develop appropriate fever management strategies.

Preventing Fevers: Strategies for Maintaining Good Health

While not all fevers are preventable, many are caused by infections that can be avoided through good health practices. Here are some strategies to reduce your risk of developing fever-inducing illnesses:

• Practice good hygiene: Wash your hands frequently with soap and water, especially before eating and after using the bathroom.
• Stay up-to-date on vaccinations: Many vaccine-preventable diseases can cause fevers.
• Maintain a healthy lifestyle: Eat a balanced diet, exercise regularly, and get adequate sleep to support your immune system.
• Avoid close contact with sick individuals when possible.
• Practice food safety: Cook foods thoroughly and avoid consuming raw or undercooked meats.
• Use insect repellent and take precautions against insect-borne diseases when traveling to areas where these are common.
• Stay hydrated and avoid overexertion in hot weather to prevent heat-related illnesses.

Remember, while these strategies can help reduce your risk, they can’t eliminate it entirely. Being prepared to recognize and manage fever when it does occur is an important part of maintaining your health.

Understanding fever – its causes, symptoms, and appropriate management strategies – empowers you to make informed decisions about your health. While fever can be uncomfortable, it’s often a sign that your body is actively fighting infection. By knowing when to treat fever at home and when to seek medical attention, you can support your body’s natural healing processes while ensuring you get appropriate care when needed.

Fever in adults – Harvard Health

Fever is one of the body’s most effective ways of fighting infection. It is part of your body’s defense against infection-causing germs.

You get a fever most often when your body is trying to kill infectious invaders such as viruses or bacteria. A higher body temperature helps the immune system respond more vigorously to the attack, and makes it harder for these microbes to survive.

What is considered a fever in adults?

The average body temperature is 98.6° F (37°C). But “normal” body temperature varies from person to person. It also changes during the day, rising a bit after you eat or exercise. Body temperature is often higher in the afternoon than it is when you wake up in the morning.

Fever means a body temperature of 100.4° F (38°C) or higher.

High fever in adults

While any temperature above your normal temperature range is considered a fever, there are different levels of fever severity:

• Low-grade: 99. 1 to 100.4 F (37.3 to 38.0 C)
• Moderate-grade: 100.6 to 102.2 F (38.1 to 39.0 C)
• High-grade: 102.4 to 105.8 F (39.1 to 41 C)

When to worry about fever

If you have a fever over 104°F (40°C), you should call your doctor.

Seek medical help right away if you have a fever along with any of these symptoms:

• seizure
• loss of consciousness
• confusion
• stiff neck
• trouble breathing
• severe pain anywhere in the body
• swelling or inflammation of any part of the body
• vaginal discharge that is discolored or smells bad
• pain when urinating or urine that smells bad.

Causes of fever

An infection, such as the flu, is the most common cause of fever.

Other conditions can also cause a fever. These include diseases that produce inflammation, such as rheumatoid arthritis; reactions to drugs or vaccines; and even certain types of cancers.

Accompanying symptoms

The following symptoms may also accompany fever:

• sweats
• chills
• headache
• achy muscles
• lack of desire to eat
• rash
• restlessness
• weakness.

A very high fever can cause confusion, extreme sleepiness, irritability, and seizures.

Diagnosing the cause of a fever

To help determine why you have a fever, your doctor will ask you about:

• other symptoms such as coughing, abdominal pain, vomiting, diarrhea, or pain when urinating
• recent surgeries or injuries
• recent vaccinations
• new drugs you may be taking
• recent travel, particularly travel abroad.

How to treat a fever at home

By itself, fever is usually harmless, though a high fever can be miserable. These steps may help you feel better:

• Drink plenty of fluids to help cool your body and prevent dehydration.
• Eat light foods that are easy to digest.
• Get plenty of rest.
• Take ibuprofen (Advil, Motrin, or others), naproxen (Aleve, Naprosyn, or others), or acetaminophen (Tylenol, others) to help relieve head and body aches and lower your temperature.
• Take a slightly warm (not cool) bath, or apply damp washcloths to the forehead and wrists.

Image: yacobchuck/Getty Images

Treat High Fever in Children and Adults

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The Urgency Room is your comprehensive one-stop location for your urgent needs. Our standalone facilities are expertly outfitted with emergency trained providers and  state-of-the-art equipment to handle the variety of aches, pains, breaks, and illnesses that come through our doors every day.

Schedule an appointment at any of our three locations, open 365 days a year, including holidays, from 8:00 AM to 9:00 PM. Our telehealth services are available from 8:00 AM to 8:00 PM. Situated in Woodbury, Vadnais Heights, and Eagan, The Urgency Room is the quick and convenient alternative to overcrowded and understaffed emergency rooms for residents throughout the Twin Cities.

If you or your child has a high fever, don’t hesitate to seek care. Don’t drudge through hours of waiting at your typical emergency room. Instead, get evaluated and treated at your nearest Urgency Room, fast. With short wait times, friendly staff, and highly experienced providers, you’ll be back to yourself in no time.

What Is Considered a High Fever in Adults?

Most adults have a baseline temperature of 98. 6 F. Generally, temperatures of 103 degrees Fahrenheit or higher are considered high for an adult. However, when an adult sustains a temperature higher than 100 degrees Fahrenheit for an unusually long period of time, it could also be cause for concern. It’s best to act on the safe side and seek care at The Urgency Room right away. Fevers can be very complex and can stem from many different types of illnesses or infections. The providers at The Urgency Room can accurately assess and diagnose the source of your high fever. 

Fevers occur when the hypothalamus, your body’s “thermostat,” increases your body’s temperature because of fever-producing substances called pyrogens. When pyrogens are released into your blood, you could wind up with a dangerously high fever. Pyrogens could come from bacteria, drugs, toxins, viruses, and fungi. The severity of fever and its detrimental results increase as your condition persists—which is why getting a high fever treated sooner is always your best option.  

High Fever Thresholds 

Once a fever goes beyond the high level, an adult enters dangerous fever levels (104 F – 107 F). This dangerous level, also known as hyperpyrexia, is considered a medical emergency and you should seek medical care immediately. 

To give you a rough idea of the fever levels in adults, here’s a list: 

• Low high fever: 100 F – 101 F
• Intermediate high fever: 102 F
• Serious high fever: 103 F – 104 F
• Hyperpyrexia: 104 F – 107 F

It is sometimes difficult to pinpoint the source of a fever as there are an incredible number of diseases and illnesses that have high temperatures as a side effect or symptom. And while fevers most frequently accompany a viral illness, our providers will try and get down to the exact source. 

What Is Considered a High Fever in Children?

A high fever in a child may be any temperature higher than 100 degrees Fahrenheit, especially if that temperature is sustained above the 100-degree threshold for extended periods. If your child’s temperature is not showing signs of reducing, you should seek emergency care.

The severity and damage a fever can cause vary by the age of the child. Younger children and infants should be seen by a medical provider sooner than an adult or teenager would with a similar temperature.

In addition to high or rising temperatures that last longer than 24 hours, a child with a high fever could have other obvious symptoms. Be on the lookout for severe diarrhea, dehydration, repeated vomiting, seizures, or rash. Your child is especially susceptible to serious infections if they have any type of immune disorder or haven’t received immunizations.

When minutes matter, especially if your child has a high fever, get to your nearest Urgency Room—we have shorter wait times and state-of-the-art equipment to treat your illness fast.        

When Is It Time to Seek Care?

As listed above, the duration one with a high fever should wait to seek medical treatment varies depending on age. An infant should be seen right away even if it has temperatures constituting a low fever in adults. Similarly, an adult can wait until the fever persists for a day or two while a child, depending on its age, should be seen as soon as they’ve had a fever of any temperature for longer than 24 hours.

You may try fever-reducing medicines (ones containing acetaminophen) before seeking medical care, however, always consult with a medical provider if you are uncertain what medicine to administer for your child. 

Consider Using Telehealth for Less Intense Fevers

If you’re not experiencing a medical emergency but you’re concerned about your fever level or that of your child, consider using online care services. The Urgency Room utilizes video technology for patient convenience and overall experience improvement. You won’t have to waste precious time in your vehicle or using public transportation, not to mention waiting in the lobby. Just follow the instructions on our Online Care page.

How Can The Urgency Room Treat High Fevers in Adults and Children?

The Urgency Room is well-equipped to take care of you or your child when experiencing a high fever. Prolonged fever or dangerously high fevers can cause an onslaught of residual health problems, so it is always best to seek care rather than ignore the problem.

All three Urgency Room locations are equipped with providers and staff who have extensive emergency room experience as well as equipment to assess, diagnose and treat your illness or injury. 

Up-to-date technology at our Urgency Room locations includes:

• X-ray machines
• CT scanner
• Ultrasound
• High-complexity lab
• Sedation for adults and children

The Urgency Room also has a large library of at-home aftercare videos for you to reference after you’ve left our in-person care. Before, during, and after illness, The Urgency Room has your well-being as our first priority.

Medical  Care for a Wide Range of Symptoms, Available In-Person or Online

Looking for fast, trusted medical care in the Twin Cities? The Urgency Room can help you avoid the crowds and long waits of typical emergency rooms. Our facilities are owned and operated by members of the Emergency Physicians Professional Association. Our board-certified physicians and staff are here for you when you need medical care the most. 

We’ll always provide you with exceptional medical care closer to home. Schedule your non-emergent visits or log in online to start a visit with one of our providers online.

Temperature scale. Celsius, Fahrenheit, Kelvin, Réaumur scale

History

The word “temperature” arose in those days when people believed that hotter bodies contained a greater amount of a special substance – caloric than less heated ones. Therefore, temperature was perceived as the strength of a mixture of body substance and caloric. For this reason, the units of measure for the strength of alcoholic beverages and temperature are called the same – degrees.

From the fact that temperature is the kinetic energy of molecules, it is clear that it is most natural to measure it in energy units (ie in the SI system in joules). However, temperature measurement began long before the creation of molecular kinetic theory, so practical scales measure temperature in conventional units – degrees.

Kelvin scale

Thermodynamics uses the Kelvin scale, in which the temperature is measured from absolute zero (the state corresponding to the minimum theoretically possible internal energy of the body), and one kelvin is equal to 1/273.16 of the distance from absolute zero to the triple point of water (the state at where ice, water and water vapor are in equilibrium). The Boltzmann constant is used to convert kelvins to energy units. Derived units are also used: kilokelvin, megakelvin, millikelvin, etc.

Celsius scale

In everyday life, the Celsius scale is used, in which the freezing point of water is taken as 0, and the boiling point of water at atmospheric pressure is taken as 100 °. Since the freezing and boiling points of water are not well defined, the Celsius scale is currently defined in terms of the Kelvin scale: degrees Celsius equals Kelvin, absolute zero is taken to be -273. 15 °C. The Celsius scale is practically very convenient, since water is very common on our planet and our life is based on it. Zero Celsius is a special point for meteorology, since the freezing of atmospheric water changes everything significantly.

Fahrenheit

In England and especially in the USA, the Fahrenheit scale is used. This scale is divided by 100 degrees from the temperature of the coldest winter in the city where Fahrenheit lived to the temperature of the human body. Zero degrees Celsius is 32 degrees Fahrenheit, and a degree Fahrenheit is 5/9 degrees Celsius.

The current definition of the Fahrenheit scale is that it is a temperature scale where 1 degree (1°F) equals 1/180 of the difference between the boiling point of water and the melting point of ice at atmospheric pressure, and the melting point of ice is +32°F. The temperature on the Fahrenheit scale is related to the temperature on the Celsius scale (t ° C) by the ratio t ° C \u003d 5/9(t °F – 32), that is, a change in temperature of 1 °F corresponds to a change of 5/9 °C. Proposed by G. Fahrenheit in 1724.

Reaumur scale

Proposed in 1730 by R. A. Reaumur, who described the alcohol thermometer he invented.

Unit – degree Réaumur (°R), 1 °R is equal to 1/80 of the temperature interval between the reference points – the temperature of melting ice (0 °R) and boiling water (80 °R)

1 °R = 1.25 °C

The scale is now out of use, it has been preserved for the longest time in France, the author’s homeland.

Comparison of temperature scales

¹ Normal human body temperature is 36. 6°C ±0.7°C, or 98.2°F ±1.3°F. The commonly quoted value of 98.6 °F is an exact Fahrenheit conversion of the 19th century German value of 37 °C. Since this value does not fall within the range of normal temperature according to modern concepts, we can say that it contains excessive (incorrect) accuracy. Some values ​​in this table have been rounded.

Comparison of Fahrenheit and Celsius scales

To transfer the degrees of Celsius to Kelvina, it is necessary to use the formula of t = t+t ₀ Where T-temperature in the Kelvins, T-temperature in Celsius, T ₀ = 273.15 Celvina. The degree Celsius is equal in size to Kelvin.

Body temperature

Well, who said that your ideal temperature is 36.6 ° C? And if the thermometer is 35.4 or 37.2 ° C and you feel good at the same time? Is it worth it in this case to sound the alarm, swallow packs of pills for prevention and run to the hospital?
The body temperature of a young healthy person ranges from 36.2 to 36.8 °C. And only for 5% of people are normal indicators below or above the average. That is why some, for whom the lower limits are characteristic, “almost die” at 37.2 ° C, while others simply do not notice such a slight increase.
You can find out what the norm is for you personally if you measure your temperature in the morning, afternoon and evening with good health. After all, during the day it changes: the lowest is before noon, when the body is still sleeping, then it gradually rises and reaches a maximum by about 4 pm.

How to measure temperature correctly?

The temperature of the skin is not the same in different parts of the body, for example, on the foot – only about 20 °C. In sports medicine, there is the concept of weighted average skin temperature (WTC), which is measured at five points (in the forehead, chest, hand, thigh and lower leg).
The most common “home” way to find out the temperature is to put a thermometer under your arm. But it is the least reliable. The temperature in the mouth fluctuates depending on the cold or hot food eaten. It is best to put a thermometer, and only electronic, in the ear or rectum.
If you don’t have a thermometer handy, try to determine the temperature by touching your forehead with your lips or the back of your hand.

What can influence the temperature?

First of all – the individual characteristics of the body. As a rule, people with a slow metabolism have a lower temperature than those with a stable and high metabolism. But if, despite feeling good, you continue to worry about your body temperature being too low, try a school favorite method: put a few drops of iodine on a sugar cube and eat it. If the thermometer creeps up, then everything is in order: the body is working properly, and low readings are your norm.

Factors affecting a woman’s temperature:

Menstrual cycle. 2 weeks before it starts, as a rule, it decreases, and on the first day it increases.
Pregnancy. For no apparent reason, for several months it is increased by several tenths of a degree in 30% of expectant mothers.
Smoking. Nicotine interferes with normal blood circulation, reduces the supply of oxygen to the vessels. These deviations in the system lead to a decrease in body temperature.
Age. Over time, she may change her “healthy” indicators. By the age of 65, they often decrease by 1-2 °. There are some advantages to this: for example, it becomes easier for women to endure the sweltering heat.
Genetics, lifestyle, environment. True, the significance of these factors is not so great.

Our body has the ability to maintain a constant body temperature. Neither the African heat nor the Russian cold can shake it. He possesses this feature thanks to a special organ located in the cerebral cortex – the hypothalamus. It is he who controls the heat balance of a person.
If we are hot, the vessels dilate, passing more blood, the skin heats up, sweating increases, as a result of which the temperature drops. If it is cold outside, the vessels, on the contrary, narrow, the skin remains cold and does not give off heat. By the way, the same hypothalamus makes us shiver when it’s cold. We tremble – and warm up. A person spends a huge amount of energy to maintain the thermal balance, thanks to which he can be active and vital at any time of the year. Without this ability, people would be forced to roam all the time after good weather.

Temperature and sports

During sports, metabolic processes are activated, cardiac output, minute volume of blood, its flow to the skin increase … Such changes lead to an increase in temperature. During normal training, it is small – a few tenths of a degree. In addition, our brain quickly compensates for the costs of habitual exercises and brings the indicators back to normal. Another thing is extreme loads, when the recovery process takes longer, since the changes are very significant. For example, marathon runners have a body temperature of 38.9 at the finish line.°C regardless of the weather. If you dared to run such a race, then the thermometer could rise to 40 ° C and above. It’s just that professional athletes have better thermoregulation mechanisms than ordinary people. In other words, they begin to sweat when there is still plenty of strength left. And an amateur often already suffocates, but at the same time remains completely dry, which is harmful to the body.

Abnormalities

There are situations in which the hypothalamus, which is responsible for maintaining heat balance, needs outside help. Fever is one of the ways the body fights infection, when the inflammatory process ends with the release of blood from unnecessary chemical elements at the cellular level. But if the elevated temperature does not fall below 38.5 ° C for several days, it is necessary to start taking some kind of antipyretic, because the internal organs of a person cannot function for a long time at a high temperature.
The body also needs help when the temperature drops to 35 ° C, which happens due to prolonged hypothermia (hypothermia). In this case, a warm drink and warm clothing are needed. A slight decrease in temperature can also be observed in the post-traumatic period, as well as in elderly people due to low activity or malnutrition.
Often, critical changes in body temperature are caused by inadequate behavior of the person himself. Follow the advice: always dress appropriately for the weather, do not sit in the steam rooms and do not jump into the hole as soon as you decide to become a walrus.

Interesting facts

The highest temperature – 46.5 ° C – was registered in 52-year-old American Willie Jones in 1980. He suffered heatstroke and was taken to the hospital. He was discharged 24 days later in a satisfactory condition. The lowest temperature – the Russian Viktor Kharin in 1960. They found him outside on a frosty night. The protocol says: “A numb body in icy clothes. When tapped, a dull sound is heard, as from blows on wood. The body surface temperature is below 0 °C, signs of life are not determined. Diagnosis: general freezing, clinical death. When the victim was placed in a hot bath and resuscitation began, after 1.5 hours he developed weak breathing and a pulse. For 12 hours, the body temperature of the man rose to 36 ° C.

There is a special method of treatment – pyrotherapy (from the Greek “fire”), when a person is specially injected with pyrogens – substances that cause fever. The feverish state is accompanied by the activity of the pituitary-adrenal system, the acceleration of blood flow in the internal organs by 2-3 times, and the stimulation of the immune system. At such a high temperature, blood clots dissolve more efficiently, dense scar tissue dissolves, degenerate tumor cells die, and the activity of the nervous system is restored.

The need to introduce a single temperature scale arose at the beginning of the 18th century – by that time there were already more than 30 of them. The German physicist Gabriel Daniel Fahrenheit and the Swedish astronomer and physicist Anders Celsius, who was the first to manufacture alcohol and mercury thermometers, took up this task.