Allergy is a pathology of countries with a high index of socio-economic development and most of all residents of large cities. By 2025, according to the WHO, 50% of the world's population will suffer from allergies [14]. This article examines the main risk factors for the development of allergic diseases in children under the age of 18 in Tashkent. The most significant factors were: the presence of an inherited predisposition on the line of one (RCh 1.9) or both parents (OR 5.6), closely related marriages between parents (RCh 2.8), the age of parents over 40 at the time of conception of the child (RCh 1.4) and some others.