Newborn babies with dilute watery stools may be caused by viruses, bacteria and other infectious factors, but also diet, climate and other non-infectious factors. 1. Infectious factors: viruses, bacteria and other pathogenic microorganisms infecting the intestinal tract can cause damage to the mucosal function of the small intestine, intestinal electrolyte secretion, inflammation caused by a large amount of fluid exudation and other pathological changes, leading to diarrhea, can appear dilute watery stools. 2. Non-infectious factors: (1) Dietary factors: improper artificial feeding, feeding food allergies, intestinal indigestion of sugar and other factors will increase the stimulation of the intestinal tract, causing increased intestinal peristalsis, the child will appear dilute watery stools. (2) Climatic factors: sudden changes in weather, the temperature is too low leading to abdominal cold, can make intestinal peristalsis increase, the appearance of watery stools; the weather is too hot can also induce digestive disorders resulting in children with watery stools. There may be other reasons for newborn babies to have watery stools, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.