Acid reflux symptoms and symptoms of GERD are a resultant effect of the relaxation of the stomach muscles. The symptoms of this condition have to understood and taken care of Acid reflux syndrome occurs because of the changes that take place in the wall that exists between the esophagus and the stomach. When the sphincter muscle present in the lower part of the esophagus relaxes, then the gastric juices present within come up under pressure. We also have a laryngophageal reflux.