All diseases related to the gastrointestinal tract and the accessory organs of digestion are known as gastrointestinal diseases. The gastrointestinal tract comprises of the stomach, esophagus, small intestine, large intestine and rectum. The accessory organs of digestion include the tongue, salivary glands, liver, gallbladder and pancreas. Oral diseases related to the GI tract include gingivitis, acid erosion, periodontitis, mouth ulcers, dental caries and angular cheilitis. Gastroesophageal reflux disease and Barrett's oesophagus are some of the oesophageal diseases. Gastric diseases include gastroenteritis and peptic ulcers. Enterocolitis and ulcerative colitis are two common intestinal diseases. Fatty liver diseases, non-alcoholic fatty liver diseases and hepatitis are examples of common liver diseases. The topics included in this book on gastrointestinal medicine are of utmost significance and bound to provide incredible insights to readers. It presents researches and studies performed by experts across the globe. This book will prove to be immensely beneficial to students, doctors and researchers in this field.