Acid reflux occurs when the sphincter muscle at the lower end of your esophagus relaxes at the wrong time, allowing stomach acid to back up into your esophagus this can cause heartburn and other signs and symptoms frequent or constant reflux can lead to gastroesophageal reflux disease (gerd). Acid reflux causes. Acid reflux occurs when acid leaks from the stomach back up into the esophagus an occasional bout of acid reflux is generally not a cause for concern.
acid reflux causes
