What is GERD? Gastroesophageal Reflux Disease, also known as GERD, is caused by stomach acid traveling up into the throat after eating or drinking instead of staying in your stomach. GERD can be extremely painful and frustrating if not treated properly. The spine is an essential part in your overall health. Proper spinal care can help to control GERD by making sure you don’t have any spinal misalignments that can cause nerve interference.