Black spots in the stool may be caused by food, and may be caused by bleeding hemorrhoids and other gastrointestinal bleeding. 1. hemorrhoids: for example, internal hemorrhoids can be caused by hard, dry stools, etc., through the anal canal when the internal hemorrhoids will be subjected to the pressure of stools leading to bleeding, with the discharge of stools, you will see red blood clots or black spots on the stool. 2. Gastrointestinal bleeding: such as gastrointestinal malignant tumors make the gastrointestinal tract chronic bleeding, through the intestinal tract after the appearance of black spots on the stool. However, we can’t exclude the black spots on the stool caused by food. If the results of stool routine, blood routine and other tests are abnormal, it is recommended to consult a doctor in a timely manner, with the help of the doctor to clarify the cause of the disease, and to carry out targeted treatment or treatment, so as not to delay the condition.