“…Pain syndrome and dyspeptic disorders prevail in the clinic. Clinical manifestations of the disease depend on the nosological form of the disease: chronic gastritis is characterized by a decrease in appetite, an unpleasant taste in the mouth, belching, heaviness in the abdomen and rumbling after eating, bloating, flatulence; clinical manifestations of chronic gastroduodenitis and duodenal ulcer are diverse and depend on the degree of structural changes in the mucosa, their localization, the stage of the pathological process, the functional state of the stomach and metabolic disorders in the body [1,2,7,10,14,16]. For chronic inflammatory diseases of the gastroduodenal zone, the characteristic common signs of the disease are symptoms of general intoxication: weakness, lethargy, disturbed sleep, often headaches, pallor of the skin, decreased muscle tone, manifestations of vitamin deficiency [5,6,9,11].…”