Gastrointestinal bleeding in the elderly is also very serious. This is because most elderly people have a combination of underlying diseases, such as hypertension, diabetes, and coronary heart disease. And gastrointestinal bleeding can lead to insufficient blood supply to the related organs and aggravate the primary disease. In addition, repeated bleeding can also induce anemia, and acute hemorrhage can also lead to hemorrhagic shock, which in serious cases can endanger the patient’s life, so it is also very serious. As for the gastrointestinal bleeding in the elderly, the cause should be actively identified. The most common ones are caused by malignant tumors, especially colorectal cancer and gastric cancer. After the diagnosis is clear, surgical treatment should be actively carried out to remove the primary tumor, and postoperative treatment such as symptomatic and nutritional support should also be given. For bleeding caused by chronic ulcer disease, anti-ulcer drugs should be systematically applied to protect the gastrointestinal mucosa and avoid complications.