Heartburn is cause of a valve dysfunction between the esophagus and stomach known as the chyloric valve. When this valve does not close properly it can cause the necessary hydrochloric acid in your stomach to rise into the esophagus causing damage to the lining. The hydrochloric acid production in the stomach is needed for proper and safe digestion of food. The spinal nerves that pass through the mid thoracic spine provide function from the brain to the stomach, esophagus and chyloric valve. Many patients have found a decrease or elimination of their heart burn symptoms naturally. See Spinal Nerve Chart.