This document discusses common pediatric gastrointestinal disorders including colic, GERD, pyloric stenosis, constipation, gastroenteritis, appendicitis, intussusception, celiac disease, parasites, and Hirschsprung's disease. It provides an overview of the topical areas and potential causes of vomiting in children, including GI obstruction, GI disorders, allergic reactions, neurological issues, metabolic/endocrine problems, and toxic substances like lead. Resources are listed at the end for further information on pediatric primary care related to these gastrointestinal conditions.