Gastroesophageal Reflux Disease (GERD), also known as heartburn and acid indigestion, is a digestive disorder that affects the lower esophageal sphincter (LES). GERD is a continuation from an untreated acid reflux. Some of GERD symptoms are: Heartburn or burning feeling in the chest Chest pain Regurgitation of food or sour liquid Sensation of a lump in your throat Functional medicine focuses on treating the root cause of a disease. The treatment focuses on the person rather than the disease, therefore, upon consultation with your doctor, you may be suggested to: Eat small and regular meals Avoid certain foods Avoid eating right before bed Reduce body weight Stop smoking Despite the list, the right treatment depends on consultation with your doctor to determine the best treatment for you, which is prescribed based on your own body conditions.