Gastric distension and pain is mainly caused by stomach diseases, which can be categorized into organic diseases and non-organic diseases. 1. Organic diseases: common causes include gastric ulcers, gastric tumors and gastric polyps, which are related to Helicobacter pylori infection, dietary habits and medication factors, and may cause gastric distension and stomach pain. Gastric ulcers can be treated with proton pump inhibitors such as omeprazole for acid suppression, quadruple therapy against Helicobacter pylori, and gastric mucosal protectants for mucosal repair; tumors or polyps can be treated with endoscopy and surgical resection. 2. Non-organic diseases: the most common cause is functional dyspepsia. Due to slow gastrointestinal peristalsis, food and feces can not be discharged from the body in a timely manner, resulting in gastric distension. You can take drugs to promote gastrointestinal peristalsis and digestion, such as domperidone, mosapride and other drugs. Patients with bloating pain should pay attention to a light diet, choose easy-to-digest food, avoid overeating, and go to the hospital in time to do relevant examinations, such as gastroscopy, breathalyzer examination. It is recommended to use drugs under the guidance of the doctor, do not blindly use drugs on their own.