Allergies are a disorder of the immune system and often occur to environmental substances known as allergens. Allergies typically cause eyes to itch, the nose to run, and can even cause hives to appear all over the body. Allergies are abnormal immune system reactions to things that are typically harmless to most people. The immune system in someone with allergies tries to protect the body by releasing antibodies that cause certain cells in the body to release chemicals into the bloodstream. One … Technorati Tags: Allergy, people, histamine, Food Allergies, dust mites
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