Pediatric gastroenterology is a sub-specialty of pediatrics and gastroenterology that is concerned with the treatment of the conditions of the gastrointestinal tract, pancreas and the liver in children. Some of the diseases under the scope of this field are acute diarrhea, gastritis, persistent vomiting, and abnormalities in the development of the gastric tract. One of the chief gastric problems witnessed in a newborn is iron deficiency which can lead to anemia. This happens because the maternal milk does not fulfil the dietary requirement of iron. If the child rejects the food transition in the weaning period, such iron deficiency can lead to anemia and other allergies. Being overweight and underweight is another very common problem during childhood. This needs to be addressed without causing secondary effects such as gastritis and hypertension. Various endoscopic procedures including colonoscopy and esophagogastroduodenoscopy are used to examine the gastrointestinal tract and obtain tissue samples. The management of nutritional problems in children may require interventions such as placing and managing feeding tubes, and facilitation of intravenous nutrition. This book studies, analyzes and upholds the pillars of pediatric gastroenterology and its utmost significance in modern times. It explores all the important aspects of this domain in the present day scenario. With state-of-the-art inputs by acclaimed experts of this field, this book targets students and professionals.