Bloody water in infants may be related to allergic enteritis, intussusception, coagulation disorders and other factors. 1. Allergic enteritis: If breastfeeding, it may be related to certain foods in the mother’s diet. In case of formula feeding, it may be that the baby is allergic to milk protein. When a baby develops allergy, it can cause edema and hemorrhagic necrosis of the intestinal wall, causing bloody stools. 2. Intussusception: Due to reasons such as the mesentery of the ileocecal part of the infant is not yet completely fixed, it is easy to cause intussusception and vomiting, which may be accompanied by bloody stools. 3. Coagulation dysfunction: If there are skin petechiae and ecchymosis in addition to blood in the stool, it may be thrombocytopenia or coagulopathy. May be thrombocytopenia or coagulation disorders caused by bloody stools. There may be other reasons when infants have bloody stools, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.