Stale bleeding from the stomach may be more serious, because there are many causes of stomach bleeding, and the one to be alerted to is bleeding from stomach cancer, so once the patient has stomach bleeding, he needs to do gastroscopy to clarify the cause of the disease, whether it is a benign lesion or a malignant tumor that causes bleeding from the stomach, and so on. Gastroscopy is relatively simple, patients can have gastroscopy in fasting state, if it is found that the bleeding is caused by gastric ulcer or gastritis, and there is old bleeding which means that the bleeding itself has been stopped, and the conservative treatment of internal medicine can be done. If gastroscopy finds that the bleeding is caused by gastric cancer, it is necessary to take pathologic examination to further clarify the diagnosis, and after diagnosis, it is decided whether the patient should be treated by surgery or not.