At the top of the stomach, there’s a muscle called the sphincter. When you eat, the sphincter opens to let food into the stomach. When you’re not eating, the sphincter stays closed to keep food inside the stomach. The sphincter is very relaxed in babies. It's easy for a little bit of the baby’s stomach contents to leave the stomach, travel up the esophagus (food pipe), and come out through the mouth. This is called “spitting up,” and it’s normal. But spitting up is not the same as vomiting, which can sometimes be a sign of a serious problem. This sheet will help you understand the difference.
Spitting up is sometimes called a “wet burp.” It usually happens during or right after feeding. Often, only a small amount of liquid comes up. Many parents worry that a baby is spitting up most of the feeding, but usually it only looks that way, especially if your baby is having wet diapers and growing well. If your baby spits up, gently wipe the baby’s face and lips clean. There is no need to call the doctor.
Vomiting is more serious than spitting up. It’s more forceful, and a larger amount of liquid or food comes up from the stomach. It may occur with other symptoms, such as fever or diarrhea. Vomiting can happen during or after a feeding. It can also happen when the baby isn’t eating. Vomiting can be a sign that the baby is sick (see the box below).
Call the doctor right away if your baby has:
Vomit that is green-tinged or red-tinged, even if the baby vomits only once.
Persistent vomiting, no matter what the vomit looks like, if it seems more severe than normal spitting up.
Extremely forceful vomiting that happens repeatedly.
If your baby seems to be getting dehydrated. Signs of dehydration in a baby include dry mouth, sunken soft spot (fontanelle), appearing very listless or sleepy, or no wet diapers for several hours.
If your baby is not gaining weight or seems to be losing weight.