The newborn’s milk petal with yellow water may be related to the abdomen is cold, may also be due to milk protein allergy, bacterial diarrhea and other reasons caused. 1. Abdominal cold: If parents do not pay attention to the newborn’s abdominal warmth, resulting in abdominal cold stimulation, resulting in gastrointestinal peristalsis speed up, may cause the newborn’s milk with yellow water, may also be accompanied by frequent farting, abdominal distension and other symptoms. 2. Milk protein allergy: Some allergic newborns are likely to have milk protein allergy, which may be manifested in yellow water with milk petals, and may be accompanied by diarrhea, vomiting and other symptoms. 3. Bacterial diarrhea: common in the hot summer, especially formula-fed newborns, if the parents for the bottle disinfection is not good, or let the baby drink the spoiled milk powder, may lead to bacterial diarrhea, which will show the milk flap with yellow water, may be accompanied by abdominal pain, diarrhea and other manifestations. Newborns with yellow water, may also be caused by other reasons, if the symptoms are serious, should consult a doctor, diagnose the cause, give targeted treatment.