Gastroenterology is a sub-specialty of internal medicine that deals with the study and management of disorders related to the digestive system or the gastrointestinal (GI) tract. It focuses on assessing and treating medical disorders related to organs such as the oesophagus, stomach, small intestine, colon & rectum, pancreas, gallbladder, bile ducts, and liver.

Heartburn is a common symptom of Gastroesophageal reflux disease, a widespread gastrointestinal disorder. NAFLD, NASH, IBD, IBS, pancreatitis come in main domain area of gastroenterologist.