"When a child has black stool, the specific cause must be clarified first. On the one hand, it is the cause of diet, which has a certain relationship with the type of diet, but on the other hand, it is also considered to be the cause of abnormal diseases. It is suggested to carry out routine stool test to see if there is abnormal occult blood. If there are no abnormal symptoms, mainly consider diet. Eating more light vegetables and fruits is conducive to promoting the color change of this stool. "