SILVER SPRING, Md, September 23, 2012 ― Having a vomiting baby is not fun for you and usually scary for baby.They do not know what is happening to them, so add that confusion to the normal unpleasantness to complete the sick baby picture. The first time your baby throws up, you may panic, especially if your baby is very young or you have a typically healthy child. However, not all vomiting requires a trip to the emergency room. Read on.