Rotten belching is the regurgitation of gastric or intestinal gases with a putrid odor, accompanied by a characteristic sound. The symptom can be combined with pain or discomfort in the abdomen, dyspeptic disorders. Eructation most often occurs with diseases of the digestive system, enzyme deficiency, and some parasitic infections. To identify the cause of belching with rotten eggs, ultrasound, X-ray, endoscopic and laboratory methods are used. To reduce the frequency of erection, drugs (prokinetics, enzymes, laxatives), cleansing enemas are used.