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  1. 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.

  2. May 22, 2023 · Causes of fever. An infection, such as the flu, is the most common cause of fever. Other conditions can also cause a fever. These include diseases that produce inflammation, such as rheumatoid arthritis; reactions to drugs or vaccines; and even certain types of cancers. Accompanying symptoms. The following symptoms may also accompany fever ...

    • hhp_info@health.harvard.edu
  3. Mar 4, 2021 · Additionally, hay fever, or allergic rhinitis, does not cause a person to have a fever. Allergic rhinitis occurs as a reaction to triggers in the environment, such as pollen , mold , and pet dander .

    • Beth Sissons
  4. Sep 17, 2019 · A fever in adults is usually not something to worry about, but if the fever is very high or lasts for longer than 3 days, it could be the cause of a more serious illness.

  5. May 17, 2023 · Allergies don’t cause a fever. The term ‘hay fever’ is a misnomer,” explains allergy specialist Frank Eidelman, MD . “It’s not caused by hay and isn’t associated with a fever.”

  6. Nov 14, 2023 · Persistent (chronic) fevers are typically defined as fevers lasting more than 10 to 14 days. ... For an adult, a fever isn’t usually a cause for concern unless it goes above 103°F (39.4°C). ...

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  8. The 5 types of fever are intermittent, remittent, continuous or sustained, hectic, and relapsing. Fever is a sign that your body is fighting an infection or illness. Learn the signs of fever, what causes fever, how doctors diagnose fever, and what you can do to treat fever.

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