Gastrointestinal bleeding is usually a medical emergency and can be caused by a variety of factors, the most dangerous being ruptured esophagogastric varices. Ruptured esophagogastric varices are usually seen in patients with severe liver disease, especially in patients with decompensated cirrhosis, and can be complicated by gastrointestinal bleeding. It is often caused by varices in the esophagogastric-fundus venules due to portal hypertension, and under the effect of certain triggers, such as eating too hard food or violent vomiting, the varices rupture and bleed. Patients bleed heavily and rapidly, and their condition is very dangerous, with a relatively high mortality rate. Peptic ulcers can invade blood vessels, leading to hemorrhage, which is most common and can lead to life-threatening hemorrhagic shock in cases of heavy bleeding. Obvious nausea and vomiting can cause the patient’s cardia mucosa to tear, which can lead to gastrointestinal bleeding. Tumor diseases of the digestive system, such as esophageal cancer, gastric cancer, and colorectal cancer can cause tumor rupture and bleeding and cause GI bleeding. Bleeding caused by infection and inflammatory bowel disease is also very common, such as intestinal typhoid and ulcerative colitis can also cause bleeding of the intestinal mucosa and thus cause gastrointestinal bleeding.