Abstract. Gastroenterological pathology, including chronic diseases of the upper digestive tract in children, represents a serious medical and social problem due to its significant prevalence, course characteristics and high risk of early disability. Numerous studies examining the prevalence of chronic digestive diseases in various regions of the world indicate their high level. In Uzbekistan, there are a few studies reflecting the results of epidemiological studies among children with diseases of the gastrointestinal tract [1,2]. In the last decade, there has been no trend towards a decrease in the prevalence of pathology of the upper digestive tract in children; on the contrary, there has been a steady increase. According to various authors, its frequency has increased 2–2.5 times in recent years, which is associated both with a true increase in the number of patients with inflammatory lesions of the upper digestive tract, and with the use of new diagnostic techniques[3].Features of the course of chronic gastroduodenitis in childhood are associated with the presence of critical periods affecting the formation of the gastrointestinal tract due to uneven growth and systemic organ disintegration against the background of intense morpho functional changes, immaturity of enzyme systems, tension in metabolic processes and restructuring of the neuroendocrine system of the body [4,5].