Watery poop in infants may be caused by indigestion, intestinal inflammation and so on. 1. Indigestion: Most of them are caused by improper feeding of mothers, for example, letting infants eat too much or the time between meals is relatively short, which will easily lead to indigestion of infants, and the food is not discharged out of the body through sufficient absorption, and there may be milk petals, stool with water and other phenomena. 2. Inflammation of the intestinal tract: Most commonly seen in rotavirus or norovirus infections, can also be caused by Escherichia coli, Staphylococcus aureus and so on. It often leads to symptoms such as watery stools and abdominal pain. There may be other reasons for babies to have watery stools, so it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or therapy.