Allergen facts for kids

SEM of miscellaneous plant pollens. Pollens are very common allergens

The house dust mite, its feces and chitin are common allergens around the home

An allergen is a type of antigen that produces an abnormally vigorous immune response in which the immune system fights off a perceived threat that would otherwise be harmless to the body. Such reactions are called allergies.

Dust, pollen and pet dander are all common allergens. It is possible to be allergic to anything from chlorine to perfume. Food allergies are not as common, but some foods, like peanuts, nuts, seafood and shellfish cause serious allergies in lots of people. Sensitivities vary widely from one person (or from one animal) to another.

Seasonal allergy symptoms are commonly experienced during specific parts of the year, usually during spring, summer or fall when certain trees or grasses pollinate. Seasonal allergies are one of the main triggers for asthma. In Canada, for example, up to 75% of asthmatics also have seasonal allergies.