Barrett’s esophagus is a condition where the tissue lining your esophagus has been changed or becomes damaged. This is commonly caused by gastroesophageal reflux disease (GERD). Barrett’s esophagus does not cause symptoms. You may discover you have it only after seeing your healthcare provider for GERD symptoms or after developing esophageal cancer. People with ongoing, untreated heartburn and GERD are much more likely to develop Barrett’s esophagus so it’s important to address these issues quickly to keep your esophagus healthy.