What Is Reflux in Infants?

Reflux in infants, also known as gastroesophageal reflux (GER), occurs when the stomach contents flow back into the esophagus. This condition is common in babies and often results in spitting up, vomiting, and discomfort. Reflux typically happens because the lower esophageal sphincter, the muscle that keeps stomach contents from flowing back, is still developing.