It may be normal for newborns to poop after breastfeeding, but abnormalities such as lactose intolerance, protein allergy or indigestion cannot be ruled out. 1. Normal phenomenon: Newborns eat on the stool if there are no other abnormal symptoms, such as poor appetite, abdominal pain, abdominal distension, nausea, vomiting, etc., and the stool is also normal in nature, generally is a normal phenomenon, may be due to the baby sucking milk on the gastrointestinal stimulation, so that the gastrointestinal peristalsis accelerated caused by. With the gradual development of the baby’s gastrointestinal tract, this phenomenon will gradually be relieved. 2. Abnormalities: (1) lactose intolerance: if the newborn intestinal tract lacks lactase enzyme, the lactose in the milk is not digested completely, making the osmotic pressure in the intestinal tract increase, there will be the phenomenon of stools after eating milk. Lactase can be added to help ease the problem. (2) milk protein allergy: because the newborn gastrointestinal function is not yet fully developed, the digestive barrier function is not mature, the mucosal permeability is relatively high, the intestinal mucosa will form an immune-inflammatory reaction with the protein, so the baby will appear after eating milk poop phenomenon. (3) dyspepsia: dyspepsia is usually associated with intestinal flora imbalance, improper diet, abdominal cold, etc., if the newborn’s dyspepsia, it is also more likely to appear after eating milk poop phenomenon. Parents need to pay attention to keep the baby warm, regular and quantitative breastfeeding, if necessary, give probiotics such as bifidobacteria to regulate. Newborns who have diarrhea after breastfeeding, if accompanied by abnormal symptoms, should consult a doctor for a clear diagnosis. The above medications should be used in accordance with medical advice.