The treatment of upper gastrointestinal bleeding temporarily focuses on fasting and symptomatic fluid replacement. If the patient exhibits significant anemia, actively transfusing red blood cells to correct the anemia is advised. It is recommended that the patient rests in bed, with heart monitoring, blood pressure, and pulse being monitored. As for medications, acid-suppressing, stomach-protecting, and hemostatic drugs may initially be chosen for observation. Once the vital signs and condition have stabilized, it is important to promptly complete routine blood tests, electrocardiograms, and gastroscopy. Among these, gastroscopy is the most crucial diagnostic method, as it can clarify the cause and nature of the bleeding, such as gastric ulcer bleeding, gastric cancer bleeding, etc. Treatment plans vary depending on the cause; if the bleeding is suspected to be due to peptic ulcer disease, medication support is generally the first choice. If the bleeding is suspected to be from malignant transformation of gastric cancer, surgical intervention is typically necessary.