GERD, also known as Gastro-esophageal reflux disease or acid reflux disorder refers to the condition characterized by the back flow(reflux) of the stomach content like stomach acid and bile in to the oesophagus. The oesophagus is the hollow, muscular organ that carries food and liquids from the throat to the stomach.
Normally, during digestion process, the lower oesophageal sphincter (LES) present at the junction of oesophagus and stomach opens to let the food pass into the stomach and closes to block the back flow of the food and stomach acidic juices into the oesophagus. However, in case of GERD, the reflux occurs due to weak LES or if it works or relaxes in inappropriate way.
GERD results in oesophageal inflammation and thereby increasing of ulcers, narrowing of oesophageal stricture or oesophageal cancer.