Newborns with yellow watery stools can be seen in physiological phenomena, pathological conditions (such as infectious diarrhea disease) and other cases, the intervention needs to be based on the cause of the decision, such as bacterial infections caused by diarrhea disease need to be anti-infective and other treatments. 1. Physiological phenomenon: such as exclusive breastfeeding babies may occasionally loose thin stools, but usually the amount is small, the number of times without obvious increase, the baby has no obvious abnormal symptoms, the mental response is good, it is a normal phenomenon, there is no need to intervene, close observation. 2. Pathological phenomena. (1) infectious diarrhea: often caused by viral or bacterial infections, may appear to solve the dilute watery stool, the number of times can be increased, some babies have blood stool, improve routine stool examination can help diagnosis, consider bacterial infections caused by the need to use antimicrobial drugs (such as cefaclor) anti-infective treatment, can be used to micro-ecological agents (such as bacillus subtilis bacillus granules) to regulate the intestinal flora and so on. (2) Cow’s milk protein allergy: the above symptoms may occur, accompanied by bloody stools, eczema and other manifestations. Breastfeeding mothers need to avoid eating protein foods, and formula feeding mothers need to adjust to hydrolyzed protein formula milk if necessary. All of the above medications should be used under the supervision of a physician. Consultation with a specialist is recommended for evaluation and treatment.