The organs involved in digestion, such as the esophagus, stomach, small intestine, large intestine, liver, gallbladder and pancreas together make up the gastrointestinal tract. The diagnosis and treatment of disorders related to the gastrointestinal tract are conducted within a medical specialty known as gastroenterology. Some of the diseases and disorders which are treated within this field are peptic ulcer disease, irritable bowel syndrome and gastrointestinal bleeding. The open sores which may form on the upper portion of the small intestine or the inside lining of the stomach are known as peptic ulcers. Irritable bowel syndrome refers to a functional disorder which is characterized by abdominal pain, bloating, and changes in bowel habits without any evidence of structural abnormalities. Gastroenterology also deals with the management of medical conditions that cause bleeding in the digestive tract. These conditions may include diverticulosis, gastrointestinal tumors and varices. This book unravels the recent studies in the field of gastroenterology. It will provide comprehensive knowledge to the readers.