Gastroenterologists, medical specialists with extensive training in diseases of the digestive tract, are equipped to answer your questions, to perform tests in making a diagnosis and to prescribe the best course of treatment to help you feel better. People with complicated conditions like Jaundice, Abdominal Pain, Constipation, Diarrhea, Gastro Esophageal Reflux Disease (GERD), Heartburn, Indigestion, Intestinal Gas and Bloating, Smoking, Cirrhosis often benefit from being treated by a specialist who has handled a large number of similar cases. Gastro–enterologists are physicians who have completed special training in the diagnosis and treatment of symptoms and diseases of the gastrointestinal tract and liver. Physicians may be trained in the treatment of adults (Internal Medicine and Gastroenterology) or children and adolescents (Pediatrics and Pediatric Gastroenterology). Gastro–enterologists use a variety of tests, including X–rays and Endoscopy, to study the intestines and liver of patients who visit them.