Gastric bleeding in the elderly is mainly caused by gastritis, gastric ulcer, gastric cancer and esophageal varices, and it is a serious condition. 1. Gastritis and gastric ulcer: when gastritis and gastric ulcer are more serious and not treated correctly, the ulcer site damages blood vessels of stomach and causes gastric bleeding, if not treated actively, it will lead to aggravation of gastric ulcer and trigger arterial hemorrhage, which is larger in volume and faster in speed, and it will be life-threatening if not treated in time. 2. Gastric cancer: stomach tumor invades blood vessels of stomach wall, and the blood vessel rupture caused by the tumor itself leads to gastric bleeding. 3. Esophagogastric varices: mostly occurring in patients with hepatitis, cirrhosis and hepatocellular carcinoma, at this time, the varices of gastric blood vessels are heavier, which will cause hemorrhage if a little bit inadvertent, which is a particularly serious situation. In addition, there are other causes of gastric hemorrhage, when the patient vomits blood or black stools, consult the doctor in time, improve the examination and symptomatic treatment.