肠易激综合征(irritable bowel syndrome,IBS)是常见的肠道功能性疾病,以腹痛或腹部不适为主要症状,排便后可改善,常伴有排便习惯的改变。由于IBS的病因与发病机制尚未完全阐明,临床症状缺乏特异性及缺乏可解释症状的形态学改变和生化异常,因此,对其作出诊断一直主要依赖于症状 Irritable bowel syndrome (IBS) is a common intestinal functional disorder, with abdominal pain or abdominal discomfort as the main symptom, can improve after defecation, often accompanied by changes in bowel habits. Because the etiology and pathogenesis of IBS have not been fully elucidated, the lack of specificity for clinical symptoms and the absence of morphological and biochemical abnormalities that explain the symptoms, the diagnosis of IBS has been largely based on symptoms