The main causes of black stools after childbirth can be categorized into three groups, namely internal bleeding, drug metabolism and bloody food. It is recommended to clarify the causes, adjust the diet, and if necessary, follow the doctor’s instructions for drug treatment to improve the symptoms. Common causes and treatments 1, internal bleeding: the more common cause is stress ulcers, after cesarean section, can be due to excessive blood loss or intraoperative drug application, and the gastrointestinal tract stress ulcers, these ulcers will secrete hemorrhagic secretions, resulting in black stools. Treatment is mainly based on proton pump inhibitors, such as omeprazole; 2, drug metabolism: some mothers need to take iron to prevent anemia due to excessive blood loss during delivery, and iron will combine with hydrogen sulfide in the gastrointestinal tract, resulting in black stool color, which is a normal phenomenon. In addition, for women with peptic ulcers, doctors sometimes prescribe drugs such as colloidal bismuth pectin and bismuth potassium citrate, which are oxidized in the gastrointestinal tract and can cause black stools when excreted with the feces. Both of these cases, will gradually improve after stopping the drug; 3, blood food: in China, the mother to sit on the moon, the diet is based on meat, including pig liver, sheep liver, pig blood, duck blood and other animals with high blood cell content of food, these foods are rich in iron, a large number of food will lead to black stools. At this time should be appropriate to reduce the intake of such food, postpartum diet as far as possible to the nutritional balance of the main, you can increase the proportion of vegetables, fruit intake.