GERD: Symptoms Make an Appointment Refer a Patient Ask a Question Reviewed by Jeffrey B. King, MD (February 01, 2016) Gastroesophageal reflux is a backward flow or reflux of stomach contents into the esophagus. Symptoms of gastroesophageal reflux disease include: Heartburn Sour taste in the mouth Pain occurring in the middle of the chest or stomach Chronic cough Choking sensation Increased trouble breathing while asleep Swallowing problems Sore throat Recurrent pneumonia Chronic sinusitis. GERD: Causes GERD: Treatment Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.