Most babies vomit small amounts from time to time and bring up some milk when they burp. This is normal and usually nothing to worry about.
How to reduce vomiting
Keep your baby upright for 30 minutes after a feed. If you are bottle-feeding and having problems with vomiting, try using a smaller teat. Larger teats have a fast flow which may be stimulating your baby's gag reflex.
Some babies bring up more milk than others after a feed. It can be upsetting when this happens and you may be worried that something is wrong. Once your baby is gaining weight, there is probably no need to worry.
Talk to your public health nurse or GP if your baby is not thriving, if the vomiting is forceful or if your baby seems to be in pain.