About This Condition
Hay fever is an allergic condition triggered by the immune system’s response to inhalant substances (frequently pollens).
Researchers have yet to clearly understand why some people’s immune systems over-react to exposure to pollens while other people do not suffer from this problem. Symptoms of hay fever are partly a result of inflammation that, in turn, is activated by the immune system.
Inhaled allergens trigger sneezing and inflammation of the nose and mucous membranes (conjunctiva) of the eyes. The nose, roof of the mouth, eyes, and throat begin to itch gradually or abruptly after the onset of the pollen season. Tearing, sneezing, and clear, watery nasal discharge soon follow the itching. Headaches and irritability may also occur.
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