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The average body temperature is 98.6 F (37 C). But normal body temperature can range between 97 F (36.1 C) and 99 F (37.2 C) or more. Your body temperature can vary depending on how active you are or the time of day. Generally, older people have lower body temperatures than younger people have.

Children with relatively high fevers may not look or act particularly sick. Treating a fever depends on the degree of discomfort. If your child is uncomfortable or restless, these home care strategies may help:

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Body temperatures vary slightly from person to person and at different times of day. The average temperature has traditionally been defined as 98.6 F (37 C). A temperature taken using a mouth thermometer (oral temperature) that's 100 F (37.8 C) or higher is generally considered to be a fever.

Oral and rectal thermometers generally provide the most accurate measurement of core body temperature. Ear or forehead thermometers, although convenient, provide less accurate temperature measurements.

There's probably no cause for alarm if your child has a fever but is responsive. This means your child makes eye contact with you and responds to your facial expressions and to your voice. Your child may also be drinking fluids and playing.

When your immune system responds to disease, the hypothalamus can set your body temperature higher. This prompts complex processes that produce more heat and restrict heat loss. The shivering you might experience is one way the body produces heat. When you wrap up in a blanket because you feel chilled, you are helping your body retain heat.

Children between the ages of 6 months and 5 years are at increased risk of a seizure that occurs during a fever (febrile seizure). About a third of the children who have one febrile seizure will have another one, most commonly within the next 12 months.

A febrile seizure may involve loss of consciousness, shaking of limbs on both sides of the body, eyes rolling back or body stiffness. Although alarming for parents, the vast majority of febrile seizures cause no lasting effects.

Fevers in kids are usually caused by an infection. A fever helps the body by stimulating the immune system to fight the infection. Doctors also think the higher temperature makes it harder for the germs to grow.

Overdressing: Infants, especially newborns, may get fevers if they're overdressed, wrapped in a blanket, or in a hot environment because they don't regulate their body temperature as well as older kids. But because fevers in newborns can be a sign of a serious infection, even infants who are overdressed must be checked by a doctor if they have a fever.

Don't worry too much about a child with a fever who doesn't want to eat. This is common with infections that cause fever. For kids who still drink and urinate (pee) normally, not eating as much as usual is OK.

If your child feels warm or is acting unwell, use a digital thermometer to confirm a fever. Different ways of taking the temperature are more accurate than others at measuring the true body temperature.

Lukewarm sponge baths to lower a fever generally are not recommended. In fact, sponge baths can make kids uncomfortable from shivering. Never use rubbing alcohol (it can cause poisoning when absorbed through the skin) or ice packs/cold baths (they can cause chills that can raise body temperature).

Offer plenty of fluids to avoid dehydration because fevers make kids lose fluids faster than usual. Oral rehydration solutions (like Pedialyle, Enfalyte, or store brands) are a good choice. You also can give water, soup, ice pops, and flavored gelatin. Avoid drinks with caffeine, including colas and tea, which can make dehydration worse by making kids pee more often.

The temperature that should trigger a call to the doctor depends on a child's age, the illness, and whether they have other symptoms. You might ask if your doctor has specific guidelines on when to call about a fever.

All kids get fevers, and in most cases they're back to normal within a few days. For older babies and kids, the way they act can be more important than the reading on your thermometer. Everyone gets a little cranky when they have a fever. This is normal and should be expected.

To bring down a fever without medication, Dr. Joseph suggests wearing minimal clothing or bathing in lukewarm or cool water. You should also be sure to drink plenty of fluids to keep your body hydrated.

A fever is a body temperature that is higher than normal. It usually means there is an abnormal process occurring in the body. Exercise, hot weather, and common childhood immunizations can also make body temperature rise.

A fever is not an illness by itself. Rather it is a symptom that something is not right within the body. A fever does not tell you what is causing it, or even that a disease is present. It may be a bacterial or viral infection. Or, it could be a reaction from an allergy to food or medicine. Becoming overheated at play or in the sun can also result in fever.

Normal body temperature ranges from 97.5F to 98.9F (36.4C to 37.2C). It tends to be lower in the morning and higher in the evening. Most healthcare providers consider a fever to be 100.4F (38C) or higher. High fevers may bring on seizures or confusion in children. It's not how high the temperature is, but how fast the temperature goes up that causes a seizure.

A fever has other symptoms besides a higher-than-normal temperature. These are especially important when caring for babies, young children, and disabled people. These groups may not be able to express how they feel. Signs that mean fever include:

Taking a temperature rectally is the most accurate method in children under 3 years of age. In older children and adults, take the temperature under the armpit or in the mouth. Talk with your healthcare provider about the best way to take your temperature.

You can treat a fever with acetaminophen or ibuprofen in dosages advised by your healthcare provider. Switching between giving acetaminophen and ibuprofen can cause medicine errors and may lead to side effects. Never give aspirin to a child or young adult who has a fever.

Call your healthcare provider for guidance anytime you are uncomfortable with the conditions of the fever, and remember to contact your healthcare provider any time a temperature spikes quickly or persists despite treatment.

Normal body temperatures are different for everyone, but they usually fall within the range of 97 to 99 degrees F. A temperature of 100.4 or higher is considered a fever, but there is no medical standard. The type of thermometer you use affects the temperature you get, as some are more accurate than others.

A low-grade fever is when you have a temperature that is slightly higher than normal, usually around 99.5 to 100.3 F. A low-grade fever signals that something is going on to activate your immune system.

Although a fever is easy to measure with a thermometer, finding its cause can be hard. If you see your doctor, they'll do a physical exam and ask questions about your symptoms, other health conditions you have, medications you take, and if you've recently traveled to areas that have health risks. A malaria infection, for example, may cause a high fever that gets better and then comes back in cycles. Some areas of the U.S. are hot spots for infections such as Lyme disease and Rocky Mountain spotted fever.

Sometimes, you may have a "fever of unknown origin." That means whatever's causing your fever isn't clear. Instead, it could be more unusual like a connective tissue disorder (diseases that affect things like your tendons, ligaments, skin, or cartilage), cancer, or another health problem. Your doctor may need to run tests to figure out the cause.

Intermittent. With this type of fever, your temperature rises, but falls back to a normal range during the day. The difference can range from a small increase to about 2 degrees Fahrenheit.

Febrile seizures usually happen within the first 24 hours of your child's fever, and they might be the first sign your child is sick. Call 911 or your doctor immediately, even if the seizure lasts just a few seconds.

Body temperature regulation is a fundamental homeostatic function that is governed by the central nervous system in homeothermic animals, including humans. The central thermoregulatory system also functions for host defense from invading pathogens by elevating body core temperature, a response known as fever. Thermoregulation and fever involve a variety of involuntary effector responses, and this review summarizes the current understandings of the central circuitry mechanisms that underlie nonshivering thermogenesis in brown adipose tissue, shivering thermogenesis in skeletal muscles, thermoregulatory cardiac regulation, heat-loss regulation through cutaneous vasomotion, and ACTH release. To defend thermal homeostasis from environmental thermal challenges, feedforward thermosensory information on environmental temperature sensed by skin thermoreceptors ascends through the spinal cord and lateral parabrachial nucleus to the preoptic area (POA). The POA also receives feedback signals from local thermosensitive neurons, as well as pyrogenic signals of prostaglandin E(2) produced in response to infection. These afferent signals are integrated and affect the activity of GABAergic inhibitory projection neurons descending from the POA to the dorsomedial hypothalamus (DMH) or to the rostral medullary raphe region (rMR). Attenuation of the descending inhibition by cooling or pyrogenic signals leads to disinhibition of thermogenic neurons in the DMH and sympathetic and somatic premotor neurons in the rMR, which then drive spinal motor output mechanisms to elicit thermogenesis, tachycardia, and cutaneous vasoconstriction. Warming signals enhance the descending inhibition from the POA to inhibit the motor outputs, resulting in cutaneous vasodilation and inhibited thermogenesis. This central thermoregulatory mechanism also functions for metabolic regulation and stress-induced hyperthermia. 9af72c28ce