Allergy are known as allergic diseases they are caused by number of condition on hypersensitivity of the immune system.These allergy occur when the immune system reacts to the foreign substances  such as pollen.bee venom or pet dander  and food it does not cause reaction in most of the women. The immune system produces substances called antibodies. When allergy occur the antibodies of immune identify particular allergen of antibodies are harmful.when allergies occur the immune system reaction can inflame your skin, sinuses, airways or digestive system.These allergy may varies from person to person and can range from minor irritation to anaphylaxis.Some symptoms are sneezing, runny or stuffy nose, watery red or swollen eyes. Itching of the nose, eyes and mouth.  

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