Babies cry when they drink milk usually because of oral problems, choking, breast milk allergies and so on. 1. Oral problems: when the baby has a sore throat because of a cold or mouth ulcers, thrush, etc., the baby may cry when eating milk and other behaviors. 2. Choking: If the baby is often choked while breastfeeding, he or she may subconsciously feel fear while breastfeeding, thus refusing to breastfeed and crying and other behaviors. 3. Breastmilk allergy: mother’s breast milk usually contains the mother’s daily diet of food ingredients, if the baby is allergic to these food ingredients, it is easy to refuse to eat breast milk and crying behavior. There may be other reasons why babies cry when they drink milk, so it is recommended that you go to the hospital in time to have a complete examination to determine the cause of the problem and then give targeted treatment under the guidance of the doctor.