Foam in baby’s stool may be related to physiological factors, indigestion, enteritis, etc. The specific analysis is as follows: 1. Physiological factors: physiological factors can appear in the stool foam, such as breast milk contains lactose, in the digestion of lactose will produce acid, the phenomenon of stool foam. 2. Indigestion: Indigestion in babies will cause the food residue in the intestine to ferment and produce gas, which will lead to foam in the stool. 3. Enteritis: Bacterial or viral infections in babies cause enteritis, which can lead to foamy stools. Foam in baby’s stool may be related to other reasons, it is recommended to go to the hospital in time for relevant examinations, to clarify the cause of the disease and treat the symptoms.