Gastroesophageal reflux disease (GERD) happens when stomach acid flows back up into the esophagus and causes heartburn. This backwash is known as acid reflux, and it can irritate the lining of the esophagus The main symptoms include heartburn and acid reflux, which is a burning sensation in the chest caused by stomach acid traveling up towards the throat. GERD is caused by frequent acid reflux, which occurs when the lower esophageal sphincter does not close properly, allowing stomach contents to flow back into the esophagus. If left untreated, it can potentially lead to serious effects on your oral health. Make sure to tell your dentist if you are experiencing any GERD symptoms.