Medical Definition of Hay fever
Hay fever: A seasonal allergy to airborne particles characterized by itchy eyes, runny nose, nasal congestion, sneezing, itchy throat, and excess mucus.
Hay fever is a misnomer because it is not caused by hay and it does not produce a fever. It is also known as allergic rhinitis or pollinosis.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 6/9/2016
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