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. What causes ger and gerd? ger and gerd happen when your lower esophageal sphincter becomes weak or relaxes when it shouldn’t, causing stomach contents to rise up into the esophagus the lower esophageal sphincter becomes weak or relaxes due to certain things, such as.
acid reflux causes
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