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Hay Fever Overview


Hay fever, also called allergic rhinitis, upper respiratory tract allergies, and allergic conjunctivitis, is a common condition. Hay fever is caused by an abnormal immune system response to substances (called allergens) that are produced seasonally in nature and are carried through the air.

Hay fever allergy symptoms—watery, itchy eyes, congestion, allergic cough, sneezing, and runny nose—occur when the immune system overreacts to inhaled allergens and prod...Read the full article