If your baby has foam in the stool, you can give digestive aids, such as lactase, multi-enzyme tablets, pepsin, etc. You can also give the traditional Chinese medicine Pediatric Gastrointestinal Tablets for oral consumption, and probiotics, such as Pepcid, Mamie’s Love, Yield, and Rectify, etc. These drugs have the effect of helping digestion to a certain extent. A foul-smelling stool in the baby indicates protein indigestion. If the stool smells sour and foamy, it means that the sugar substances are not digested properly. If the stool is creamy in appearance, it indicates fat indigestion. If there are milk flaps in the stool, they are mostly soap lumps made of undigested fat and calcium or magnesium, which are not clinically significant if the amount is small.