Upper gastrointestinal bleeding is also relatively common in clinical practice, and its common causes mainly include the following points: The first is bleeding from gastric and duodenal ulcers; the second is liver cirrhosis leading to portal hypertension, which causes rupture and bleeding of gastric varices; the third is acute erosive gastritis leading to acute ulcer bleeding; the fourth category includes gastric cancer and various systemic diseases, such as bleeding caused by hematologic diseases. Therefore, if upper gastrointestinal bleeding occurs and the patient has a large amount of bleeding or rapid bleeding, they must seek medical attention immediately.