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   What is a high body temperature?

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

   Fever in adults: when to worry - Harvard Health

   www.health.harvard.edu/diseases-and-conditions/treating-fever-in-adults

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   Why do you get a fever if you have a high temperature?

   • 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.

   Fever in adults: when to worry - Harvard Health

   www.health.harvard.edu/diseases-and-conditions/treating-fever-in-adults

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   Why is my body temperature so high in the morning?

   • It can be lower in the morning and higher in the late afternoon and evening. 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.

   Fever - Symptoms & causes - Mayo Clinic

   www.mayoclinic.org/diseases-conditions/fever/symptoms-causes/syc-20352759

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2. www.health.harvard.edu › diseases-and-conditionsFever in adults: when to worry - Harvard Health

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   May 22, 2023 · 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)

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3. www.mayoclinic.org › symptoms-causes › syc-20352759Fever - Symptoms & causes - Mayo Clinic

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   May 7, 2022 · 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.

4. www.webmd.com › first-aid › fevers-causes-symptomsFever: Causes, Symptoms, and Treatment - WebMD

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   Nov 15, 2023 · Normal body temperatures are different for everyone, but they lie within the range of 97 to 99. A temperature of 100.4 or higher is considered a fever.

5. my.clevelandclinic.org › health › diseasesHyperthermia: Symptoms, Causes, Treatment and Recovery

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   Nov 19, 2021 · Hyperthermia is an abnormally high body temperature — or overheating. It's the opposite of hypothermia, when your body is too cold. Hyperthermia occurs when your body absorbs or generates more heat than it can release. A human’s normal body temperature is about 98.6 degrees Fahrenheit. Any body temperature above 99 or 100 degrees Fahrenheit ...

6. www.healthgrades.com › high-feverHigh Fever: Causes and Treatments for a High Temperature

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   Jul 25, 2022 · A high fever is a body temperate of 103ºF (39ºC) or higher in an adult. In a child, a temperature of 101ºF (38ºC) or higher is a high fever. Causes of a high fever include infections, heat exhaustion, sepsis, and noninfectious conditions, particularly those that affect the immune system. Contact a doctor if you or your child has a high ...

7. www.hopkinsmedicine.org › health › conditions-andFever | Johns Hopkins Medicine

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   Normal body temperature ranges from 97.5°F to 98.9°F (36.4°C to 37.2°C). It tends to be lower in the morning and higher in the evening. Most healthcare providers consider a fever to be 100.4°F (38°C) 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 ...

8. www.medicalnewstoday.com › articles › fever-in-adultsFever in adults: Symptoms, treatment, and when to seek help

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   Mar 31, 2020 · The following are the classifications of body temperature ranges, according to an article in the Journal of Infection and Public Health: . Mild or low-grade fever: 100.4–102.2°F (38–39°C ...