A lot of babies spit up, and they sometimes can spit up a lot. Every mom knows that they can go out sometimes with stains of spit-up everywhere. But spit-up is generally very harmless for babies. Sometimes spit-up can occur because they’ve taken too much air from the breast or the bottle. Sometimes it can occur because they’ve taken more milk than they can tolerate. Sometimes it can occur because they have something called reflux, and they’re regurgitating up some of their food. Usually, vomit, spit-up on its own is not really a source of concern. Spit-up is really a small patch, no bigger than this. Vomit we would consider a large volume of liquid coming from a child. Projectile vomit or repeated vomiting is usually what’s a source of concern, and something you need to speak to your doctor about. But if your child is very happy, giggling and all of a sudden spits up everywhere, but continues to be happy and giggling, it’s one of those things. Too much air, too much liquid or their tummy just not being strong enough to handle the formula at that time. If you’re concerned, the best thing to do is record how much they’re spitting up, when they’re spitting up. If you’re mixing breast and bottle and you notice huh, after every bottle feed, they’re spitting up, but during the breast feeding they’re not, they may be getting too much air with that particular bottle or that particular nipple. The only way you’ll know is if you write down detailed notes, and then if something should occur or the baby should become uncomfortable, you can take that information to your doctor. So spit-up is something that’s OK, but repeated vomiting or large volume of vomiting is something you would want to talk to your doctor about immediately.