消化道出血为临床常见症状 ,多数经常规检查可明确诊断 ,但仍有少数病例常规检查无法明确出血部位和病因 ,从而造成诊断和治疗上的困难。本文收集我院近 10年来 31例不明原因消化道出血住院病例的临床资料 ,对其病因诊断分析如下。1　临床资料本组病例共 31例 ,男 19例 ,女 12 Gastrointestinal bleeding is a common clinical symptom, the majority of routine examination can confirm the diagnosis, but there are still a few cases of routine examination can not clear the bleeding site and cause, resulting in diagnosis and treatment difficulties. In this paper, we collected 31 cases of hospitalized patients with unknown causes of gastrointestinal bleeding in our hospital in the past 10 years, the diagnosis of its causes as follows. A clinical data of 31 cases of this group of patients, 19 males and 12 females