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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 · 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

   • Email: hhp_info@health.harvard.edu

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.verywellhealth.com › when-is-a-fever-too-highWhat Causes a High-Grade Fever and When Is It Too High?

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   Mar 7, 2024 · When using an oral thermometer, 98.6 degrees Fahrenheit (F) is considered a normal body temperature. Anything above 99.1 F is considered a fever in adults and children. A fever is considered high when the temperature is above 103 F in adults. In young children and others, a high fever may be defined differently.

4. 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...

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

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   May 7, 2022 · 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. Depending on what's causing a fever, other fever signs and symptoms may include: Sweating. Chills and shivering. Headache. Muscle aches. Loss of appetite. Irritability.

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

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   Aug 21, 2024 · Normal Temperature. Fever. At-Home. School or Work. When to See a Provider. Fever is an elevation in the body's temperature. It's not a disease but rather a sign or response to something occurring within the body, most commonly an infection.

7. People also ask

   What is a high-grade fever?

   • High-grade fever is defined as an oral temperature of 102.4 to 105.8 F (39.1 to 41 C) in adults. It can cause all of the above, plus: Hyperpyrexia is the term for an exceptionally high fever over 106.7 F (41.5 C). It can occur in people with a severe infection or a brain hemorrhage.

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

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   What is the difference between moderate and high-grade fever?

   • Moderate-grade fever is defined as an oral temperature of 100.6 to 102.2 F (38.1 to 39.0 C) in adults. High-grade fever is defined as an oral temperature of 102.4 to 105.8 F (39.1 to 41 C) in adults. It can cause all of the above, plus: Hyperpyrexia is the term for an exceptionally high fever over 106.7 F (41.5 C).

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

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   What is a high fever in a child?

   • In children, body temperatures between 99.5 F and 101.3 F are considered by some to be elevated. 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.

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

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   How long does a high grade fever last?

   • 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 coming back for up to 14 days. A fever that lasts longer than normal may be serious even if it is only a slight fever.

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

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   What causes a high fever?

   • A high fever can also be caused by drug reactions, inflammatory diseases, autoimmune disorders, excess heat exposure, and other non-infectious conditions. These conditions cause fever by disrupting the part of the brain that functions as the body's thermostat, called the hypothalamus.

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

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8. www.webmd.com › a-to-z-guides › what-is-hyperpyrexiaWhat is Hyperpyrexia? What are its causes, symptoms, and ...

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   Jul 7, 2023 · ‌Hyperpyrexia is a condition where the body temperature goes above 106.7 degrees Fahrenheit (41.5 degrees Celsius) due to changes in the hypothalamus — the organ in the brain that regulates...