thanks for your question
in a baby is a common observation. Usually air enters stomach along with milk during feeding a neonate so after every feed neonate usually burp or some times even vomits. Best way to avoid this is to burp neonate after every feed.
> hold the baby in upright position and put baby's head on your shoulder and give support to his back and head and then gently pat on his back with hand for 10-15 minutes.
> don't over fed your baby, usually feed on demand or after every 3-4 hours.
> exclusive breast feeding for at least first six months.
> enzyme preparations for infants as xymix drops can be used
> if problem still persist kindly consult a pediatrician
thanks, kindly rate :)