Newborns cry more than once after drinking milk, mostly due to indigestion, milk protein allergy, mouth ulcers and so on. 1. indigestion: most of them are caused by improper feeding, due to the newborn’s digestive function is not perfect, if too much feeding will easily cause indigestion, after drinking milk bloating, abdominal pain and thus more than crying. 2. Milk protein allergy: may be due to the formula of the relevant components, resulting in newborns digestive allergy, intestinal peristalsis increased, and even intestinal mucosal bleeding, resulting in newborns crying. 3. Mouth ulcers: when a newborn suffers from mouth ulcers, there will be obvious pain in the mouth, and when eating milk, the contact of the mouth with the nipple will cause pain, so the newborn will cry after drinking milk. A newborn crying after drinking milk, there may be 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.