关键词: 儿童, 下消化道出血, 内镜

Abstract: Lower gastrointestinal bleeding typically refers to bleeding from the intestines below the Trietz ligament，which includes small intestine bleeding and colon bleeding. It is relatively common in children， and although there is relatively less research on lower gastrointestinal bleeding compared to upper gastrointestinal bleeding，and there are few guiding documents and consensus.With the rapid development of pediatric endoscopy technology in recent years，especially small bowel endoscopy，capsule endoscopy，and various endoscopic treatment methods，most children with lower gastrointestinal bleeding can be effectively diagnosed and treated.However，there are still a few cases that are difficult to diagnose and treat clinically.This article summarizes the clinical evaluation，diagnosis，and treatment methods of pediatric lower gastrointestinal bleeding，aiming to standardize the diagnosis and treatment process of pediatric lower gastrointestinal bleeding.

Key words: child, lower gastrointestinal bleeding, endoscopy