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1. www.health.harvard.edu › treating-fever-in-adultsFever in adults: when to worry - Harvard Health

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   May 22, 2023 · 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.

   • Email: hhp_info@health.harvard.edu

2. www.verywellhealth.com › when-is-a-fever-too-highWhen Is a Fever Too High? - Verywell Health

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   Mar 7, 2024 · A high fever can also occur if certain infections are left untreated and either get worse or start to affect other organs. Infectious causes of high fever include: Appendicitis (inflammation of the appendix) Cellulitis (a skin infection in deeper skin layers) Encephalitis (inflammation of the brain)

3. www.healthline.com › health › cold-fluFever in Adults: Characteristics, Types, and When It's Serious

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   Sep 17, 2019 · A high grade fever happens when your body temperature is 103°F (39.4°C) or above. Most fevers usually go away by themselves after 1 to 3 days. A persistent or recurrent fever may last or keep ...

4. www.healthpages.org › health-a-z › fever-adults100, 101 or 102 Degree Fever? Adult Guide to High Temperatures

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   Aug 4, 2024 · A fever is defined as a body temperature above 100.4°F (38°C). The normal oral temperature for a resting, healthy adult is about 98.6°F (37°C). However, what is considered a “normal” body temperature can vary by one degree based on age, race, and other factors. For example, an individual who is over 70 years old may have a lower normal ...

5. www.health.harvard.edu › staying-healthy › how-highHow high a fever is too high? - Harvard Health

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   Jan 1, 2023 · As with COVID, fever — defined as a temperature of 100.4° F or higher — is your immune system's response to an infection or another invader. Your elevated temperature is a clear sign something is amiss. Most fevers go down if you take an over-the-counter medication such as acetaminophen (Tylenol) or ibuprofen (Advil).

   • Author: Toni Golen, MD

   • Email: hhp_info@health.harvard.edu

6. www.mayoclinic.org › diseases-conditions › feverFever - Symptoms & causes - Mayo Clinic

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   May 7, 2022 · Is irritable, vomits repeatedly, has a severe headache, sore throat, stomachache or other symptoms causing a lot of discomfort. Has a fever after being left in a hot car. Seek medical care immediately. Has a fever that lasts longer than three days. Has a seizure associated with the fever.

7. People also ask

   Can a cold cause a fever?

   • A mild illness, like a cold or an ear infection, may cause one. Some people may have a low-grade fever after they get a vaccine. If yours doesn’t get back to normal in a few days, ask your doctor if you should pay a visit. If you have a fever, you may feel hot and sweaty. You also might shiver because you feel chilled.

   Fever Causes, Symptoms and Treatments - WebMD

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   Can a high temperature cause a fever?

   • You may have a fever if your temperature rises above this. Adults typically have a fever if their body temperature increases to 100.4°F (38°C). This is called a low grade fever. A high grade fever happens when your body temperature is 103°F (39.4°C) or above. Most fevers usually go away by themselves after 1 to 3 days.

   Fever in Adults: Characteristics, Types, and When It's Serious - Healthline

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   Can a fever be too high?

   • Febrile seizures can occur in babies and young children with temperatures greater than 100.4 F. A sustained temperature greater than 107.6 F can even lead to brain damage. This article will explain what fevers are and how to know when a fever is too high. It will also describe how fever is treated and when it's time to seek emergency medical care.

   What Causes a High-Grade Fever and When Is It Too High? - Verywell H…

   www.verywellhealth.com/when-is-a-fever-too-high-770347

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   Can a high fever make you feel better?

   • 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.

   Fever in adults: When to worry - Harvard Health

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

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   Does fever get worse as temperature rises?

   • The symptoms of fever get worse as the temperature rises. Fevers are broadly categorized as being low-grade, moderate-grade, high-grade, and hyperpyrexia. A low-grade fever is defined as an oral temperature of 99.1 to 100.4 F (37.3 to 38 C) in adults.

   What Causes a High-Grade Fever and When Is It Too High? - Verywell H…

   www.verywellhealth.com/when-is-a-fever-too-high-770347

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8. www.webmd.com › cold-and-flu › ssFever Causes, Symptoms and Treatments - WebMD

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   Jul 18, 2024 · How Fever Affects Your Body. If you have a fever, you may feel hot and sweaty. You also might shiver because you feel chilled. Weakness, aches, or fatigue could happen. You may have symptoms of ...