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      • A high fever is when body temperature rises above 103ºF (39ºC) in an adult or above 101ºF (38ºC) in a child. There are many causes of a high fever, including common conditions such as a sore throat, sinusitis, and urinary tract infections (UTIs). Some causes may be more serious and require immediate medical care.
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  2. May 22, 2023 · 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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  3. Aug 4, 2022 · Here's what you need to know about fever in adults: What the possible causes are, temperature ranges and when to be concerned, how to make sure the temperature reading is accurate, when you need to see a doctor, stages of fever and how to treat a fever.

  4. May 7, 2022 · Doctors & departments. On this page. Overview. Symptoms. When to see a doctor. Causes. Complications. Prevention. Overview. 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.

  5. 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...

  6. Overview. What is a fever? A fever is when your body temperature rises higher than normal. A fever itself isn’t an illness. Rather, it’s a symptom of a wide range of health conditions. When your body temperature rises a few degrees above normal, it can be a sign that your immune system has been activated, often to fight an infection.

  7. Nov 15, 2023 · 6 min read. What Is a Fever? A fever is a sure sign your body is fighting off some type of infection. (Photo credit: E+/Getty Images) A fever is when you have a brief rise in body...

  8. Mar 7, 2024 · Why You Get Fever. Causes of High Fever. Symptoms. When to Act. Home Treatment. If you are an adult with a fever over 103 F (39.4 C), you need to call your healthcare provider immediately. If it is over 105 F (40.5 C), you need to rush to your nearest emergency room.

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