Untreated gastroesophageal reflux disease (GERD) can lead to serious complications. These may include esophageal stricture, bleeding, and precancerous changes in the esophageal lining, such as Barrett's esophagus. The following symptoms are important indicators that should prompt you and your doctor to take notice: difficulty swallowing (dysphagia), bleeding, a choking sensation, chronic cough, hoarseness, and unexplained weight loss.