Dark stools but normal stool routine usually do not require treatment, but if the patient has dark stools for a long time, then you need to consider the presence of upper gastrointestinal bleeding, then you need to treat it as soon as possible. Dark stools with normal bowel movements are usually considered to be due to physiologic reasons. This situation may occur when eating heavily pigmented food and animal blood products such as pig blood, duck blood, etc. or taking iron supplements for anemia, etc. There may be a transient darkening of the stool, and the symptoms will gradually be relieved after changing the diet or stopping the medication, and generally no treatment is needed. If the patient has black stools for a long period of time, it is necessary to consider the existence of upper gastrointestinal bleeding, and then need to be treated as soon as possible. It is recommended that patients should go to the hospital for treatment as soon as possible if they experience any discomfort, and should not use medication on their own in order to avoid adverse consequences.