The majority of four-month-old babies do not eat milk is caused by indigestion, improper breastfeeding posture and other factors. 1. indigestion: eating too much milk piled up in the gastrointestinal tract, will increase the burden on the gastrointestinal tract, resulting in gastrointestinal tract peristalsis slowed down, the symptoms of indigestion, which will affect the baby, the symptoms do not eat the milk appeared. 2. Improper breastfeeding posture: If the breastfeeding posture is not correct, it will lead to the baby uncomfortable and not drink milk symptoms. The baby’s four-month-old baby does not eat 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, to give targeted treatment or treatment.