Allergy, also identified as allergic diseases, is a figure of situation caused by sensitivity of the resistant method. They comprise hay fever, food allergies, atopic dermatitis, allergic asthma, and anaphylaxis. Symptoms may comprise red eyes, itchiness, and runny nose, eczema, hives. Food allergies and reactions to the venom of stinging insects more frequently consequence in cruel reactions. Not all reactions or intolerances are forms of allergy.