The main cause of stomach pain is bile reflux gastritis, peptic ulcer, dyspepsia, gallbladder disease, etc. It is necessary to promptly consult the gastroenterology department to clarify the specific causes of the disease and then treat the symptoms. 1, bile reflux gastritis: bile reflux from the duodenum into the stomach leading to gastric mucosal damage caused by the disease, sitting position is relatively less than the lying position bile reflux symptoms, the stimulation of the gastric mucosa Bile reflux symptoms are reduced in the sitting position compared with the lying position, and the stimulation of gastric mucosa is reduced, and the pain is subsequently reduced. When patients have recurrent abdominal pain and distension, nausea, vomiting, acid reflux and belching, they should promptly seek medical attention for gastroscopy and H. pylori examination. Gastric mucosal protective agents can be selected for treatment, such as bismuth potassium citrate and aluminum thioglycollate. 2. Peptic ulcer: the ulcer surface is just stimulated by gastric juice and gastric acid when the patient is lying down causing stomach pain, if the position is changed and the ulcer surface is not in contact with gastric juice and acid, the pain is reduced. Proton pump inhibitor drugs can be selected, such as omeprazole, pantoprazole, rabeprazole, etc.; 3. Indigestion: When indigestion causes gastric distention, it may lead to stomach pain lying down and alleviated by sitting up due to the movement of gas. The symptoms are generally mild, and patients can be relieved by their own regulation, eating not too full, proper exercise, eating digestive foods, such as yam, hawthorn, lemon, etc.; 4, gallbladder disease: such as cholecystitis, gallbladder stones, etc. When the sitting position is taken, the tension of the abdominal muscle is reduced, the symptoms of inflammatory stimulation are reduced, and the pain is lessened than in the supine position. Need to treat for the cause, for example, patients with cholecystitis can take oral magnesium sulfate, deoxycholic acid tablets; gallbladder stones patients can be de-stone treatment.