Vomiting is a common occurrence in the neonatal period. It may be a physiological phenomenon or an early symptom of a serious disease. Internal vomiting: 1, caused by normal physiological reasons: because the newborn’s stomach is horizontal, the cardia is more relaxed and the pyloric sphincter is more tense, so vomiting is likely to occur, and elevating the head of the bed can prevent it. 2 amniotic fluid swallowed into the stomach: a large amount of amniotic fluid swallowed into the stomach, there is a certain stimulating effect on the stomach, vomiting after birth, vomit is mostly mucus, so repeated vomiting can be 1% soda lavage. Bayannur City Hospital Pediatrics Hongxia 3, inhaling too much air: newborn sucking false nipples, breast milk head too small or nipple concave, bottle feeding when the nipple is not filled with milk, etc. Vomiting caused by this cause, you can pick up the child after feeding and gently pat his back, to be put down after he belches. 4, too much milk feeding: too much milk in the stomach infants crying or hyperactivity is very easy to vomit, so to feed regularly, not binge drinking. 5, cold stimulation: newborns are more sensitive to cold stimulation, often due to insufficient warmth and vomiting. 6, taking bitter drugs: bitter drug stimulation can cause reflex vomiting. 7, extra-digestive tract infection: such as respiratory tract infection. 8, pyloric spasm: newborns vomit more often, when well, parents should take their children to the hospital for examination. 9, brain diseases: such as intracranial infection, intracranial hemorrhage, etc. 10, indigestion: eat unclean or indigestible food, feed cold milk, etc. can cause vomiting. 11, functional intestinal obstruction: such as toxic intestinal paralysis. 12 other causes: such as allergies to certain foods, drugs.