[Lower Gastrointestinal Bleeding: Current State of Diagnosis and Treatment and Interpretation of the Clinical Guidelines].

Lower gastrointestinal bleeding (LGIB) is a common clinical emergency. However, most of the published findings on LGIB were of retrospective or observational studies, and the relevant clinical guidelines and consensuses were not published until quite recently. In clinical practice, LGIB treatment is not as standardized as the treatment of upper gastrointestinal bleeding. Herein, on the basis of the latest clinical research findings on and guidelines for LGIB, we summarized and analyzed the existent diagnosis and treatment of LGIB from the perspectives of patient assessment and endoscopic, interventional and medication treatment, intending to provide more references to support the clinical practice.