The causes of flatulence in babies may be due to drinking milk too fast, inappropriate nipple, enteritis, indigestion and so on. 1. Drinking milk too fast: As babies drink milk too fast and too hastily, air will enter the abdomen with the milk, hence the phenomenon of flatulence. 2. Inappropriate nipple: It may be due to the inappropriate size of the nipple hole, resulting in air entering the baby’s intestines and stomach with the gap in the nipple, hence the phenomenon of flatulence. 3. enteritis: it may be due to the baby’s abdomen is cold, so after drinking milk will appear flatulence, diarrhea, nausea, vomiting and other enteritis phenomenon. 4. Indigestion: it may be due to the baby’s indigestion, gas-producing bad bacteria proliferation or milk allergy, lactose intolerance, etc., so it is easy to produce a lot of gas after drinking milk. Babies drinking milk flatulence may also have other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.