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Gastroesophageal reflux in infants and children.

What is reflux? Reflux (also called gastroesophageal reflux) happens when swallowed food or liquid in the stomach passes back up into the throat and mouth through a tube called the esophagus (eh-SOF-ah-gus). “Spitting up” (also called regurgitation) is a form of reflux that happens in infants when the swallowed liquid or food moves from the stomach and into the mouth. Spitting up is considered normal in most infants. It is usually worst around four months of age, and gets better by one year of age. Sometimes, toddlers, children, and adolescents have reflux. If reflux causes your infant or child to have pain, heartburn, weight loss, or other concerning symptoms, then he or she might have gastroesophageal reflux disease (GERD) and should see a doctor.