Chronic acidity, Acid Reflux or what’s called Gastroesophageal Reflux Disease (GERD) in medical parlance, is the back flow of stomach contents into the esophagus (food pipe). There are various reasons behind GERD, such as hiatus hernia (protrusion of part of the stomach through the diaphragm into the esophageal area), reflux esophagitis, abdominal pressure associated with obesity, or pregnancy pyrosis (heartburn during pregnancy). GERD is caused by a prolonged relaxation of the lower esophageal sphincter and delayed gastric emptying, causing irritation of the esophagus as there is abnormalities in the secretion of gastric acid, bile, and pepsin.