If the stool appears black, consider the presence of gastrointestinal bleeding. The treatment of gastrointestinal bleeding mainly includes: 1. symptomatic treatment: chronic and small amount of bleeding is mainly treated for the primary disease, the acute phase should be bed rest, fasting, closely observe the changes in the condition, pay attention to monitoring blood pressure, respiration and heart rate. 2. blood volume replenishment: in acute hemorrhage, intravenous fluids should be administered quickly to maintain blood volume and prevent blood pressure from dropping, and in patients with relatively large bleeding, blood transfusion should also be considered. 3. 3.Microscopic treatment: It is not suitable for acute hemorrhage and diffuse hemorrhage, and its treatment methods include electrocoagulation, cryoplegia, thermal probe hemostasis and spraying hemostatic drugs on the bleeding site.