



Allergies are triggered by various allergy-causing substances (allergens) such as pollens, moulds, and animal dander. In the springtime, typical allergens are pollens that come from grasses and trees. During the rest of the year, other allergens such as pet dander, mites found within house dust, and moulds are common.
Most people who have allergies have inherited them; however, allergies can develop on their own later in life. People with allergies have an antibody called IgE (immunoglobulin E). This substance causes an excessive reaction to allergens. Typical allergy symptoms include repetitive and prolonged sneezing, runny or plugged nose, itchy,...
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Last updated: March 05th, 2010