What Are The Causes Of Allergic Reactions?

There are hundreds of ordinary substances that can trigger allergic reactions. Among the most common are plant pollens, molds, dust mites, animal dander, foods, medicines, feathers and insect stings. These triggers are called “allergens.” An allergic reaction may occur anywhere in the body, but usually appears in the skin, eyes, lining of the stomach, nose, sinuses, throat and lungs – places where special immune system cells are stationed to fight off invaders that are inhaled, swallowed or come in contact with the skin.