Foamy poop in infants may be caused by physiological reasons, or may be caused by pathologic reasons, different causes, different treatments. Such as changing milk powder, anti-infection treatment. 1. Physiological reasons: breast milk or milk powder has more lactose, if the baby is lactose intolerant, most of the lactose is broken down by the lactase enzyme in the intestinal tract to produce acid and gas, stimulating the baby’s intestinal tract, thus forming foamy stools. If it is caused by lactose intolerance, you can use lactose-free milk powder feeding, replaced by lactose-free milk powder feeding, generally will not appear foamy stool again. 2. Pathological causes: Some gastrointestinal diseases may cause indigestion in babies, such as enteritis. The symptoms are foamy stools, loss of appetite and poor mental condition. It is recommended to consult a doctor in time. After receiving a systematic examination and clarifying the cause of the disease, the doctor will design a treatment plan according to the condition. For example, if it is caused by enteritis, if necessary, follow the doctor’s instructions to apply montelukast and other drugs to treat. At the same time, prevent dehydration and replenish fluids. Infants who have prolonged foamy stools that are not relieved by a change in milk formula should be seen by a doctor as soon as possible for treatment.