Forty to fifty million Americans suffer from allergies and asthma. There are several different types of allergic diseases. They are usually defined by either the allergen which produces the symptoms, such as animal allergies, or by the symptoms the allergens produce such as allergic rhinitis, hay fever. Allergic diseases can affect any part of a system in the body or the entire body.
Please see the categories listed to learn more about specific allergic diseases, and consult your allergist for a concise diagnosis.