There are many causes of stomach pain, which are analyzed as follows: 1. The most common ones are gastritis and gastric ulcer, accompanied by heartburn and regular pain after meals; 2. Gastric cancer, which is a long-term irregular pain, accompanied by weight loss or black stools; 3. Pyloric edema obstruction of the stomach, accompanied by distension and vomiting of overnight food; 4. Portal laceration which occurs when there is violent vomiting after drinking alcohol, accompanied by vomiting fresh red blood; 5. Gastric polyp, which is generally a benign disease; 6. Polyps, generally benign diseases; 6, gastroptosis, poor emptying of food, often accompanied by flatulence and poor appetite, the body type of thin people good; 7, bile reflux caused by stimulation of the gastric mucosa pain. Stomach pain causes more, can be distinguished by gastroscopy to confirm the diagnosis.