Black stools in infants are considered to be related to dietary factors, medication factors, and may also be due to problems such as acute gastroenteritis. 1. Dietary factors, if the baby ate food containing more iron, such as spinach, may appear black stool symptoms. 2. Drugs, if the baby is given drugs containing iron, the iron into the body may also lead to the symptoms of black stool. 3. Acute gastritis, if the baby has acute gastritis, mucous membrane damage, may lead to capillary rupture bleeding symptoms, so it will lead to the baby’s black stool. The baby black stool, there may be other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.