Whether gastric ulcer is serious or not depends on the consequences triggered, such as: gastric perforation, gastric hemorrhage, cancer and so on, all of which will have serious consequences. 1. Gastric perforation: Because the ulcer is big and penetrates the whole stomach wall, the stomach content pours into the abdominal cavity, which may lead to diffuse peritonitis, which is a more serious situation and needs to be treated by surgery as soon as possible. 2. Gastric hemorrhage: bleeding is caused by deeper ulcers involving blood vessels. The clinical condition varies according to the speed and amount of bleeding. It can range from fecal occult blood to black stools and bloody stools, and the excessive bleeding will cause hemorrhagic shock or even death, which is a more serious situation. 3. Cancer: Because ulcers become cancerous due to repeated delayed healing, they need surgical treatment. Patients with gastric ulcers are advised to go to the hospital for gastroscopy and other examinations, and actively carry out the treatment, must not be careless, early detection and early treatment, do not delay the condition.