Milk flaps in the stool are usually caused by indigestion, lactose intolerance, and high protein intake. 1. Indigestion: When feeding, overfeeding, overfrequent feeding, untimely feeding, etc., may lead to indigestion and then appear the situation of milk petals in the stool. 2. Lactose intolerance: Some babies are unable to break down lactose due to lactase enzyme defects, and are unable to digest lactose in breast milk or cow’s milk, which can also lead to milky stools. 3. Eating more protein: If the amount of milk is large and the amount of protein eaten is large, the child’s stool will also have milk petals. There may also be other reasons for the presence of milk petals in the stool, it is recommended to go to the hospital in a timely manner, complete the examination to determine the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.