A four-month-old baby who doesn’t like to drink milk may be suffering from physiological anorexia, lactose intolerance, food allergy, or digestive diseases. 1. Physiological anorexia: usually in the baby 4 ~ 6 months when a sudden decrease in the amount of milk, mainly by the baby with the development of the body, curiosity about the outside world, the attention of the process of breastfeeding is diverted caused. If the baby’s mental and physical development is not affected, it can usually recover on its own. 2. Lactose intolerance: Milk powder or breast milk contains lactose, and some babies are lactose intolerant, so they do not like to drink milk, accompanied by bloating, vomiting, diarrhea and other symptoms. 3. Food allergy: the common food allergy of 4-month-old babies is dairy protein allergy, which will cause anorexia, also accompanied by bloating, vomiting, diarrhea and other symptoms. 4. digestive diseases: if the baby has indigestion due to improper feeding, or due to intestinal infections and other diseases, it will also cause the baby does not like to drink milk. The four-month-old baby does not like to drink milk may also have other reasons, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.