What Causes Your Allergies
No matter what causes your seasonal allergies, or allergic rhinitis, the process is generally the same. Particles in the air are inhaled and the immune system causes the release of histamine, which leads to an inflammatory response.
Common allergens can include pollen from trees and grasses (ragweed is especially common), mold and mildew spores. Animal hair or dander and dust mites can also be allergens but are considered chronic, or perennial, and not specifically seasonal, since they are not dependent on the time of year.
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