Belching refers to the discharge of gas from the stomach. First, belching is a symptom of the stomach, not of intestinal discomfort. When belching occurs, it indicates that the gas in the stomach flows back into the esophagus and is discharged through the mouth. This symptom is usually the manifestation of gastric diseases, including chronic gastritis, acute gastritis, peptic ulcer, gastroesophageal reflux disease, etc., and belching can occur. When belching occurs, the symptoms can be improved by oral antacid, gastric mucosal and esophageal mucosal protective drugs and drugs to enhance gastric motility. If the symptoms do not improve significantly after medication, such patients can be examined by gastroscopy to determine the diagnosis and treatment. If gastroscopy indicates gastric mucosal erosion, ulcer and other manifestations, further detection of Helicobacter pylori is required.