Allergies , also known as allergic diseases is a condition caused by hypersensitivity of the immune system of individual’s body of something in the environment or surrounding which causes very little or no effect on others immune system . These diseases may be related to skin problems, problems in digestion, respiration, blood and so on. Mainly the causes for allergies are all natural. The common symptoms seen are fever, wheezing, skin itching, sudden drop in blood pressure, restlessness, cough, watery eyes, shortness in breathing, chest tightness and so on. Allergies are hypersensitive immune responses to the substances which come in contact or enter the body of an individual who is allergic to that specific substance. These agents have differed effect on different bodies. Allergy is a response of an individual’s body immune system to a harmless substance present in the atmosphere.