An estimated 20% of Americans suffer from GERD, a chronic form of acid reflux that goes beyond occasional heartburn. Here's ...

Hutton, MD, FAAP a Maven Clinic Pediatrician. Babies often experience acid reflux because their lower esophageal sphincter isn't fully developed. To prevent acid reflux, feed your baby small meals ...

But if the lower esophageal sphincter opens too often or does not close tight enough, stomach acid can reflux, or seep back into the esophagus, causing the burning sensation we know as heartburn.

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