There are many causes of stomach cramps, such as improper diet, gastrointestinal diseases and mental factors. 1. Improper diet: overeating, irregular diet or excessive intake of cold, greasy, spicy, stimulating food, etc., easily lead to gastrointestinal dysfunction, gastric acid secretion disorder, causing damage to the stomach and intestines. 2. Gastrointestinal diseases: such as gastric ulcer, acute and chronic gastritis, intestinal obstruction and duodenal bulb ulcer, etc., the smooth muscle of the stomach wall is stimulated by inflammation, which causes stomach spasm and pain. 3. Mental factors: such as excessive stress, anxiety, depression, bitterness, irritability, etc., gastrointestinal function is affected by the nervous and endocrine system, adverse emotions easily caused by gastric discomfort, which in turn induced gastric colic. If the patient appears uncomfortable symptoms, should promptly seek medical attention.