The black color in the stool may be caused by dietary factors, drug factors, gastrointestinal disorders, and upper gastrointestinal bleeding. If the dietary factors, there is no need to intervene in the treatment; if the disease is caused, timely treatment should be carried out. 1, dietary factors: black in the stool may be related to the diet, some food can cause the stool color black, such as animal offal, chicken blood, duck blood, etc., and normal food formed when the stool mixed together, you can appear black in the stool yellow, as a normal phenomenon, no special treatment; 2, drug factors: some drugs may cause the stool yellow with black, such as bismuth potassium citrate, ferrous sulfate, etc., it is recommended that patients recall the history of taking such drugs in recent days, generally in a few days after stopping the drug will improve; 3, gastrointestinal disorders: gastrointestinal disorders, the intestinal stool is excreted more slowly, because the relatively long retention time in the intestines and the formation of feces, the color of the stool is black, and the newly produced stool combined in The combination of the new stool, the phenomenon of yellow stool with black. In daily life, you should pay attention to diet, avoid intake of cold, spicy, stimulating, greasy food, eat more fresh vegetables, fruits, pay attention to abdominal warmth. Gastrointestinal dysfunction can be relieved by moxibustion, abdominal massage and moderate exercise. It can also be treated with probiotics and other drugs under the guidance of doctors; 4. Upper gastrointestinal bleeding: Intestinal inflammation, ulcers, perforations, tumors, etc. can lead to upper gastrointestinal bleeding. Iron in the blood is oxidized, which can lead to black color of stool, and some patients have the phenomenon of black in yellow stool because blood and food are mixed together. Patients are advised to seek medical attention promptly to clarify the cause of bleeding and the location and amount of bleeding. If necessary, acid suppressants and hemostatic drugs can be used under the guidance of the doctor. If the amount of bleeding is high, blood transfusion and surgical hemostasis treatment are required.