Infants who have a lot of regurgitation, but no actual disease, have a condition that is called functional infant regurgitation. That is because of the very small volume that the infant esophagus can hold and because of other factors, including their large liquid meals and the amount of time they spend lying down. Regurgitation is a symptom that is normal and common in infants. It usually includes nausea, retching, and gagging. But technically, and medically speaking, vomiting is more forceful and uncomfortable.
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When regurgitated stomach material comes out of the mouth, it is often mistaken for vomiting, and may look exactly like vomiting. This allows the stomach material up because the normal pressure within the stomach is greater than the pressure in the chest and throat. It occurs when the muscle between the esophagus and stomach relaxes (as it does during burping). Regurgitation often includes the release of the material from the mouth, as in infants who “spit up.” Regurgitation means the backward movement of stomach contents up the esophagus (the “swallowing tube’) into the mouth.
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Bellyaches in Children: Common questions about bellyaches.Defecation Disorders after Surgery for Hirschsprung’s Disease.Enterocolitis after Treatment for Hirschsprung’s Disease.
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Frequently Asked Questions about Hirschsprung’s Disease.