GERD: Symptoms Make an Appointment Ask a Question Search Conditions This information was reviewed and approved by Jeffrey B. King, MD Gastroesophageal reflux is a backward flow or reflux of stomach contents into the esophagus. Symptoms of gastroesophageal reflux disease include:HeartburnSour taste in the mouthPain occurring in the middle of the chest or stomachChronic coughChoking sensationIncreased trouble breathing while asleepSwallowing problemsSore throatRecurrent pneumoniaChronic sinusitis. Clinical Trials Idiopathic Pulmonary Fibrosis (IPF) & GERD Skin, Airway & Esophageal Epithelial Barriers in Youth