Stomach bleeding requires a gastroscopy. Stomach bleeding belongs to the more serious lesions in the digestive system, which can cause digestive system disorders, and even death if the condition is serious. Gastroscopy is a commonly used examination measure to diagnose digestive system diseases, and it is also the preferred examination method to diagnose the cause of gastric bleeding. Gastroscopy can not only clarify the cause of gastric bleeding, but also determine the severity of bleeding, and if the amount of bleeding in the stomach is large, the bleeding can be stopped by microscopic surgery. Therefore, the examination and treatment value of gastroscopy for gastric bleeding is very high. In conclusion, gastroscopy is a must-do program for gastric bleeding, especially within 12~24 hours, which is conducive to better find the specific cause of the disease.