Allergies themselves do not directly cause fever. However, allergies may lead to health problems that can result in a fever. Typical allergy symptoms include watery eyes, sneezing, runny nose, or skin rash.
The Difference Between Allergies and the Common Flu
During an infection, white blood cells produce pyrogens that trigger a temperature increase as a natural defense mechanism. Allergens trigger a different response — the body releases histamines, causing sneezing and coughing rather than fever. This is part of why antihistamine medication is not an appropriate treatment for a cold or flu.
Common Allergy Symptoms
- Watery eyes
- Runny nose
- Coughing
- Sneezing
- Sore throat
- Swelling
- Skin rash
- Sinus pain or headache
- Postnasal drip
- Wheezing
Can Allergies Cause Fever Indirectly?
According to the American College of Allergy, Asthma, and Immunology, allergies do not cause fever directly. However, a fever accompanying allergy symptoms often indicates a sinus infection — allergies can compromise immune function and increase susceptibility to colds and sinus infections, since sinus mucus buildup invites bacterial growth.
Are You Sure Those Are Allergies?
Untreated allergies may develop into a more severe sinus infection or contribute to asthma symptoms. Medical consultation is recommended rather than self-medicating if symptoms persist or worsen.
Medical Disclaimer: This article is for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions about a medical condition.