Small‐bowel bleeding accounts for the majority of obscure gastrointestinal bleeding, but it is caused by various types of small bowel disease, upper gastrointestinal disease, and colorectal disease. For the diagnosis, history taking and physical examination are required, leading to a determination of what diseases are involved. Next, cross‐sectional imaging, such as computed tomography, should be carried out, followed by the latest enteroscopy such as small bowel capsule endoscopy and deep enteroscopy according to the severity of hemorrhage and patient condition. After a comprehensive diagnosis, medical, enteroscopic, or surgical treatment should be selected. This article reviews recent advances in the endoscopic diagnosis of obscure gastrointestinal bleeding and compares perspectives of the management of obscure gastrointestinal bleeding in Japan with that in other countries.

中文翻译：

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（2020 年特刊）不明原因消化道出血的管理：日本与其他国家指南的比较

小肠出血占不明原因消化道出血的大部分，但它是由各种类型的小肠疾病、上消化道疾病和结直肠疾病引起的。为了诊断，需要询问病史和进行体格检查，从而确定所涉及的疾病。其次，应进行CT等横断面影像学检查，然后根据出血的严重程度和患者的病情，进行最新的小肠胶囊内镜、深部小肠镜等小肠镜检查。综合诊断后，应选择内科、肠镜或手术治疗。