Newborns have immature digestion and weak defenses, so if they are not fed or cared for properly, they are prone to diarrhea and yellow water. It is not possible to make a generalization about whether it can heal itself, but there are differences according to different causes. 1, diarrhea caused by cold: baby’s stomach cold, intestinal peristalsis accelerated will lead to food in the intestine to shorten the residence time, resulting in diarrhea. The stool looks like thin water and contains milk flaps. If it is a common cold, usually after warmth, diet regulation will heal itself. 2, lactose intolerance caused by diarrhea: the characteristics of this type of diarrhea is obvious, usually stool 3-7 times / day, the stool is foamy thin watery, thin slightly green, with a special sour odor, and occasionally even produce strips of transparent mucus. Diarrhea caused by lactose intolerance cannot be self-healing, and can only be controlled by switching to hydrolyzed protein, amino acid powder or special formula free of lactose. 3, autumn diarrhea: often occurs in the fall and winter, that is, from October to February each year. Because the infant’s digestive system development and local immunity is not yet mature, so it is easy to infect rotavirus and diarrhea. It usually heals spontaneously in 7-10 days, but without symptomatic treatment, it can lead to dehydration, electrolyte disorders and circulatory failure, and rehydration therapy is recommended according to the symptoms. 4, bacterial diarrhea: If it is bacterial diarrhea, it is generally not easy to heal on its own, it is recommended to use antibiotics for timely treatment.