Gastric ulcers are benign, called benign ulcers, mostly caused by Helicobacter pylori infection, and a few are caused by eating irritating food or drinking a lot of alcohol, as well as after taking non-steroidal anti-inflammatory drugs. The main treatment is to give medication for the cause, but also to remove the cause, with the doctor to use acid suppressants, combined with gastric mucosal protective agent treatment, a full course of medication can achieve a cure. However, a small percentage of gastric ulcers may become cancerous, the cancer rate is less than one percent, and the cancer often occurs at the edge of the ulcer. Therefore, when a patient is found to have gastric ulcer by gastroscopy, a biopsy will be taken from the edge of the ulcer to help identify it clearly. Unless the patient with gastric ulcer is currently combined with gastric bleeding, biopsy will not be performed temporarily to avoid serious bleeding.