Sudden gushing of milk may be caused by gastroesophageal reflux (GERD), improper feeding and diseases. 1. Gastroesophageal reflux: Due to the immature development of the infant’s digestive system, the stomach capacity is small and in a horizontal position, and the outlet of the infant’s stomach is tight and the inlet is loose, the milk is easy to reflux, which may lead to sudden gushing of milk. 2. Improper feeding: If you feed your baby too much milk, too often, or if you bottle-feed your baby with a nipple that is too large and too fast, so that he or she swallows a lot of air while eating, it may cause sudden gushing of milk. 3. Disease: When the baby suffers from intussusception, intestinal obstruction and other diseases, it may also cause such symptoms. In addition, when the baby suffers from pneumonia, meningitis and other infectious diseases, may also cause sudden gushing of milk, it is recommended that if the baby gushing of milk, parents should pay attention to, take the child to the doctor for examination in a timely manner, to clarify the cause of the disease for targeted treatment or treatment.