Issues - Throwing up of milk

You baby throws up for in my personal experience and my talks with baby doctors, for 2 reasons.

1) Baby is overfed. Feels too full. Throw up.
This is perfectly normal. There is no way you can overfeed your baby, his/her body system repels the milk once there is an overfeed. You may have missed the signs of rejection and continue feeding. So baby throws up the extra milk. Although safe, its' not good to alway allow that to happen. You have to monitor his behaviour and understand his signs as he grows.

2) Colic, wind in his stomach.
See post: Issues - Baby keeps crying for no reason