This document discusses various types of abdominal pain in children, including acute organic pain, chronic organic pain, and functional or inorganic pain such as recurrent abdominal pain. It notes that a large percentage of abdominal pains in children are functional in nature, with no identifiable organic cause. The document advises that for cases of suspected functional pain, a thorough history, physical examination, and follow-up are sufficient and investigations like ultrasound or endoscopy are generally not needed if no alarm symptoms are present. The case discussed involved a child with recurrent epigastric pain and tenderness who was found to have irritable bowel syndrome from a poor diet, which resolved with diet modification and medication.