My View on Allergy Allergies, also known as allergic diseases, are a number of conditions caused by hypersensitivity of the immune system to something in the environment that usually causes little or no problem in most people. There are some reasons to explain why allergies are common in developed world. Initially, people living there prefer to drink milk and eat cheesecakes, bread and other food high in protein. Moreover, there are several different environments, climates, genes and lifestyles between developed world and developing world. Eventually, people there take allergies more seriously. Whereas a large part of people living in developing world don't know whether they are allergy. In order to prevent from allergies, early exposed to potential allergens might be protective. The reliable treatments for allergies include avoiding known allergens such as peanuts, milk and mangoes and the use of medication such as steroids and antihistamines.