Anti-reflux surgery is a treatment for acid reflux, also known as GERD(gastroesophageal reflux disease). GERD is a condition in which food or stomach acid come back up from your stomach into the esophagus. The esophagus is the tube from your mouth to the stomach.Reflux often occurs if the muscles where the esophagus meets the stomach do not close tightly enough. A hiatal hernia can make GERD symptoms worse. It occurs when the stomach bulges through this opening into your chest.Symptoms of reflux or heartburn are burning in the stomach that you may also feel in your throat or chest, burping or gas bubbles, or trouble swallowing food or fluids.