http://www.thedietsolutionprogramv.or... Acid reflux disorder, otherwise known as gastro-esophageal reflux disease, or GERD, comes about being a result of the coexistence of 2 diseases. The 1st acid reflux disease contributing condition is a retrograde flow of stomach contents into the esophagus. Having said that, the reflux itself does not automatically contribute to gastro-esophageal reflux disease signs and symptoms or histologic changes, and can happen among normal people young and old as well. In such cases, the process is referred to as "physiologic gastroesophageal reflux".