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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 · 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).

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2. 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.

3. www.drugs.com › medical-answers › temperatureWhat temperature is considered a fever? - Drugs.com

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   Official answer. by Drugs.com. A fever is defined as a body temperature of 38°C (100.4°F) or higher. Normal body temperature is usually 37°C (98.6°F), although it can be about a half degree Celsius higher or lower for some people and that’s normal for them. A fever occurs when your brain sets your body temperature higher than normal.

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

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   May 7, 2022 · A fever is a temporary rise in body temperature. It's one part of an overall response from the body's immune system. A fever is usually caused by an infection. For most children and adults, a fever may be uncomfortable. But it usually isn't a cause for concern.

5. www.nhs.uk › conditions › fever-in-adultsHigh temperature (fever) in adults - NHS

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   What is a high temperature? Normal body temperature is different for everyone and changes during the day. A high temperature is usually considered to be 38C or above. This is sometimes called a fever. Check if you have a high temperature. You may have a high temperature if: your chest or back feel hotter than usual

6. www.verywellhealth.com › fever-8685009Fever: Temperature Range, What’s Serious, Breaking It

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   Aug 21, 2024 · A high fever indicates a body temperature that is possibly serious or dangerous. Again, there is no formal definition, but typically, a high fever is 102.2 F or greater in babies 3 months and older and younger children. A high fever in older children and adults is a temperature of 102.4 F or greater.

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   What is a high fever?

   • Again, there is no formal definition, but typically, a high fever is 102.2 F or greater in babies 3 months and older and younger children. A high fever in older children and adults is a temperature of 102.4 F or greater. Fevers above 105.8 F are termed " hyperpyrexia " and can be seen with brain dysfunction, severe infections, or brain bleeds.

   Fever: Temperature Range, What’s Serious, Breaking It - Verywell Health

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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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   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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   What is a high fever if you have a cold?

   • A body temperature that falls between 102.4 and 105.8 F is a high-grade fever. Sometimes, you can have a high fever from only a cold or other viral infection. Hyperthermia. This is a fever over 105.8 F.

   Fever Symptoms & Causes: What Is Considered a Fever? - WebMD

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   What does a high temperature mean?

   • A high temperature is usually considered to be 38C or above. This is sometimes called a fever. You may have a high temperature if: If you feel hot or shivery, you may have a high temperature even if a thermometer says your temperature is below 38C. You do not need to take your temperature using a thermometer, but you can if you have one.

   High temperature (fever) in adults - NHS

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8. www.webmd.com › covid › what-is-a-feverFever Symptoms & Causes: What Is Considered a Fever? - WebMD

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   Jun 20, 2024 · A fever is when your body temperature is higher than usual, often due to an infection or illness. Doctors generally consider a fever to be an oral temperature of 100 F (37.8 C) or higher.