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  1. 100, 101 or 102 Degree Fever? Adult Guide to High Temperatures

    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 …

  2. Fever Symptoms & Causes: What Is Considered a Fever?

    May 31, 2023 · There are no strict guidelines for what temperature is a fever, because body temperature varies by person, time of day and method of measurement. But healthcare …

  3. What’s considered a fever and when to see a doctor

    Dec 11, 2025 · What’s considered a fever in adults and when to worry Humans – like all mammals – are warm-blooded, meaning our bodies stay warm, or at a fairly consistent temperature, …

  4. Fever - Symptoms & causes - Mayo Clinic

    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 …

  5. Fever in Adults: High & Low Grade Fever and How to Reduce a Fever

    A fever is a body temperature of 100.4 F or greater. A fever may be caused by a virus, bacteria, fungus, blood clot, tumor, drug, or the environment. Treatment of fever in adults usually …

  6. Fever in adults: When to worry - Harvard Health

    Adults usually have a fever when their temperature reaches 100.4 ° F. Learn the warning signs and when to get medical attention....

  7. Fever: Temperature Range, What’s Serious, Breaking It

    Sep 3, 2025 · A fever is a rise in the body's temperature. Many cases of fever can be managed at home without seeing a provider. Learn when to seek medical attention.

  8. Fever Temperature Chart for Adults: Know When to Act

    Feb 9, 2025 · According to the CDC, fever is one of the top five reasons people seek medical care. Yet, many of us aren’t entirely sure what each degree means for our health or what …