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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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   How long does a fever last?

   • 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. A persistent or recurrent fever may last or keep coming back for up to 14 days.

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

   www.healthline.com/health/cold-flu/fever-in-adults

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   When is a fever persistent?

   • The fever is persistent when the body temperature stays in this range for more than 2 weeks. A fever is commonly a result of the body trying to fight off an infection or another illness. However, some cases are more difficult to diagnose and treat.

   Persistent low grade fever: Causes and treatments - Medical News Today

   www.medicalnewstoday.com/articles/326175

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

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   May 22, 2023 · 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).

   • Email: hhp_info@health.harvard.edu

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

   www.healthline.com › health › cold-flu

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   Sep 17, 2019 · 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)...

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, 2022 · A fever is defined as a body temperature above 100.4°F (38.3°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.

5. www.medicalnewstoday.com › articles › 326175Persistent low grade fever: Causes and treatments

   www.medicalnewstoday.com › articles › 326175

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   Aug 29, 2019 · A persistent low grade fever is when a person’s temperature remains between 100.4°F and 102.2°F for more than two weeks. Learn about the possible causes and treatments here.

6. www.medicalnewstoday.com › articles › fever-temperatureHow to recognize a fever and when to seek help, for every age ...

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   Feb 27, 2021 · 3–10 years: When taken orally, a normal temperature for this age group is 95.9–99.5°F (35.5 – 37.5°C). 11–65 years: A normal oral temperature is 97.6–99.6°F (36.4 – 37.5°C). Over ...

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

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   Mar 31, 2020 · Types and causes. Complications. COVID-19. Treatment. Prevention. Summary. Severe illness can cause extremely high temperatures in adults that can be life threatening. A high-grade fever from a...

8. www.mayoclinic.org › diseases-conditions › feverFever treatment: Quick guide to treating a fever - Mayo Clinic

   www.mayoclinic.org › diseases-conditions › fever

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   Feb 26, 2022 · 6-24 months. Above 102 F (38.9 C) taken rectally. Give your child acetaminophen (Tylenol, others). If your child is age 6 months or older, ibuprofen (Advil, Motrin, others) is OK, too. Read the label carefully for proper dosage. Don't give aspirin to an infant or toddler.