The general absence of black stool for several days after hemostasis of GI bleeding is related to the patient’s specific situation and cannot be generalized. Gastrointestinal bleeding can be caused by inflammation of the digestive tract, mechanical injury, vascular lesions, tumors, and other factors, as well as by lesions of neighboring organs and systemic diseases involving the digestive tract. The appearance of black stool after GI bleeding is usually due to a large amount of bleeding, more than 50 ml, and a long stay in the intestine, which requires effective hemostatic treatment, and usually the black stool symptoms will be relieved 2-3 days after hemostasis. However, in some patients with severe disease and weak constitution, the black stool may also last for 3-4 days. Patients are advised to take rest, avoid spicy and stimulating, cold and hard foods, and avoid smoking and alcohol. After the bleeding is stabilized, the cause of the gastrointestinal bleeding should be clarified and the cause should be treated promptly. If the patient shows symptoms of anemia, such as weakness, panic, dizziness, etc., timely anemia correction treatment is also needed.