The baby’s poop once eaten, may be related to physiological factors, may also be due to indigestion, milk protein allergy and other reasons caused. 1. Physiological factors: commonly found in breastfed babies, usually related to the mother’s milk, if the mother’s milk contains too much fat, exceeding the baby’s daily demand, may appear to eat the phenomenon of poop, mainly because the baby’s gastrointestinal tract digestive capacity is limited. 2. indigestion: especially the younger babies, gastrointestinal system development is not yet sound, if there is improper feeding, or the abdomen is cold, is likely to cause indigestion, resulting in gastrointestinal dysfunction, may show the phenomenon of eating on the poop, may also be accompanied by abdominal distension, vomiting and other symptoms. 3. Milk protein allergy: commonly found in allergic babies, due to milk protein allergy, it may show the phenomenon of pooping after eating, may also be accompanied by nausea, vomiting and other symptoms. Baby poop when eating, may also be related to other factors, if the symptoms continue to be unable to alleviate, should be taken seriously, as soon as possible to take the baby to the doctor, after a clear diagnosis of the cause, by the doctor’s guidance for treatment.