The pain in the stomach may be caused by intestinal cramps, peptic ulcer, irritable bowel syndrome and other diseases. 1. Intestinal spasm: after the abdomen is cold or after strenuous exercise suddenly appeared stomach pain, rest for a period of time to relieve the symptoms, this situation is considered to be intestinal spasm. Most of the intestinal spasms can be relieved on their own, if the pain is more intense, you can take antispasmodic drugs, such as atropine, scopolamine, scopolamine and so on. 2. Peptic ulcer: If it is intermittent epigastric pain, it may be related to peptic ulcer. Duodenal ulcers are characterized by pain during fasting, which can be relieved after eating. Gastric ulcers are clinically characterized by pain after meals and relief on an empty stomach. The diagnosis of peptic ulcer needs to be confirmed by gastroscopy and colonoscopy. 3. Irritable bowel syndrome: If the pain is in the lower abdomen, and the location of the pain changes, and the pain is relieved during defecation or after defecation, this situation is considered to be irritable bowel syndrome. There are many other reasons why the stomach hurts at one time and not at another, so it is recommended to consult a doctor in time to identify the cause and then carry out targeted treatment.