Upper gastrointestinal bleeding is also relatively common in clinical practice. The most common causes are bleeding from peptic ulcers, rupture of esophageal and gastric varices, bleeding caused by gastric cancer, and various emergency bleedings. Once gastrointestinal bleeding occurs, medical attention should be sought promptly. If the patient experiences hemorrhagic shock or hemorrhagic anemia, it is necessary to provide blood transfusions and hemostasis, and replenish blood volume as active treatments. Additionally, for upper gastrointestinal bleeding, it is generally advisable to complete a gastroscopic examination within 24 to 48 hours, which can help clarify the cause of the patient’s gastrointestinal bleeding.