The main reasons for a 2-month-old baby’s loose stools are related to immature digestive system, lactose intolerance and gastrointestinal infection. Parents need to observe the child’s specific situation, and then go to the hospital pediatrics or gastroenterology department for examination to clarify the cause. 1, the digestive system is not mature: for small month-old baby stool is very thin, does not necessarily mean that diarrhea. Because the digestive system of small babies is not fully developed, the intestinal digestive capacity is relatively weak, when eating too much or eating discomfort and other situations arise, the baby’s intestines are prone to normal digestion, absorption of milk, thus causing the appearance of thin stool symptoms. This situation may increase with age, the digestive system gradually mature, digestion and absorption ability gradually improved, the stool will gradually thicken. At this time, parents pay attention to the baby’s general state, if the mental state is good, can eat normally, and the number of stools is not significantly increased, generally do not need to give special treatment; 2, lactose intolerance: also consider the possibility of lactose intolerance, due to lactase secretion less, the child can not completely break down the lactose in the milk, it will lead to more dilute stools, or stools more often. If diagnosed, you can add lactase to the food before each meal to relieve the symptoms of very thin stools; 3, gastrointestinal tract infection: if the baby’s bottle, milk utensils are not carefully cleaned, disinfected, resulting in bacteria, viruses in which breeding, can cause the baby’s gastrointestinal tract infection, and then the symptoms of very thin stools. In addition, some babies may have nausea, vomiting, mucus or blood in the stool, which should be collected and sent to the hospital for laboratory tests. If inflammation does exist, bottles and milk utensils should be strictly disinfected, and appropriate medication should be chosen to treat the bacteria or virus.