Baby’s bowel movements are usually seen in the following situations: First, the most common is lactose intolerance secondary to intestinal virus infection, usually seen in rotavirus enteritis, norovirus enteritis, etc., because the lactose content in breast milk or regular infant formula is relatively high, secondary lactose intolerance will cause lactose indigestion, there are many milk flaps in the stool. Second, if a newborn baby has milk flaps from birth, it is important to pay attention to primary lactose intolerance. Third, in older children, if the digestive function is not good or the intestinal virus or bacterial infection causes digestion and absorption to decrease, if the intake of milk and other foods usually appears in the stool with a lot of milk flaps.