The main causes of stomach bleeding are bad living and eating habits, drug abuse, gastric ulcer and other disease factors. 1. Bad life and dietary habits: when there is excessive mental tension, physical fatigue, overeating, etc., the blood vessels of the stomach wall dilate, and in severe cases, the blood vessels rupture, and eventually stomach bleeding. 2. Abuse of drugs: Clinical hemostatic drugs or cardiovascular drugs, such as aspirin, hormone drugs, if used improperly, may cause gastric bleeding. In addition, long-term use of non-steroidal anti-inflammatory drugs, such as ibuprofen, diclofenac and other drugs, intestinal mucosal irritation, side effects, there will be stomach bleeding. 3. Disease factors: digestive system diseases such as erosive hemorrhagic gastritis, gastric ulcer, can cause gastric bleeding, resulting in vomiting blood, black stool. Liver diseases such as cirrhosis, when there is portal hypertension, can cause rupture of esophagogastric fundus varices and bleeding. Malignant tumors of digestive tract, such as gastric cancer, usually have no specific symptoms in the early stage, and gastric bleeding can occur when the condition worsens and the tumor invades blood vessels. There are many causes of gastric bleeding, and it is necessary to go to the hospital in time to get a clear diagnosis and deal with it under the guidance of the doctor.