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  1. May 17, 2023 · Allergies Don’t Cause a Fever — At Least, Not Directly. Infections like sinusitis, colds, flu and COVID-19 can cause a fever, but allergies aren’t infections. If you have seasonal allergies ...

  2. Jul 27, 2023 · Allergies can cause symptoms that are very similar to a cold or flu, such as a runny nose, sore throat, or sneezing. However, allergies do not cause a fever. Because each allergy has a different ...

    • Rachel Nall, MSN, CRNA
  3. Apr 27, 2018 · Allergy symptoms typically include sneezing, watery eyes, a runny nose, or even a skin rash. If your allergies cause sinus congestion, that could lead to an infection and fever, however. Learn ...

    • James Roland
  4. Mar 4, 2021 · Allergies do not cause a fever, but they may lead to health issues that can cause a fever, such as a sinus infection. Other conditions, such as bacterial or viral infections, can have similar ...

    • Beth Sissons
  5. Nov 4, 2023 · Can seasonal allergies cause fever, though? They can’t—and a fever might be indicative of a larger problem. ... Sinusitis is more of an infection caused by allergies or a cold, which can make ...

    • Beth Rush
  6. Apr 11, 2024 · Anaphylaxis is the most severe form of an allergy and is a medical emergency. Studies have shown that allergies cause inflammation, which can lead to nasal obstruction, fluid accumulation, bacterial infection, and acute disease. When allergy symptoms are not resolved, it can lead to the development of other illnesses, which can cause a fever.

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  8. Nov 9, 2024 · Allergies, including hay fever (allergic rhinitis), do not generally cause a fever. However, allergies can cause inflammation in the nose and sinuses, which can sometimes lead to sinusitis (sinus infection). When this happens, you might develop a low-grade fever (99°F to 100.4°F), but the fever is due to the infection, not the allergy itself.

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