Gastrointestinal bleeding, especially lower gastrointestinal bleeding, is a common and urgent condition in gastroenterology. It is relatively common clinically, and generally has good treatment outcomes. However, due to different causes, the treatment efficacy and methods may vary. For upper gastrointestinal bleeding caused by different reasons, the prognosis also varies. For example, upper gastrointestinal bleeding caused by gastric ulcers generally responds well to medical treatment and usually can be cured. However, if considering upper gastrointestinal bleeding caused by gastric tumors, particularly gastric cancer common among the general population, the treatment outcome may not be as favorable. Besides surgery and chemotherapy, the five-year survival rate is relatively higher, but for advanced-stage gastric tumors, the treatment efficacy is generally poorer and the prognosis is relatively worse.