肠易激综合征 (IBS)是一种常见的以腹痛 /腹部不适伴排便习惯改变为特征的功能性肠病 ,缺乏形态学和生化学改变的生物学标志。其病因和发病机制复杂 ,一般认为是个体特异性的多病因的异质性疾病。其常见的病因为 :精神因素的作用 ,应激 ,感染 ,神经功能紊乱 (内脏敏感性增高 ) Irritable bowel syndrome (IBS) is a common biological marker of functional bowel disease characterized by changes in abdominal pain / abdominal discomfort with bowel habits, lacking in morphological and biochemical changes. The etiology and pathogenesis of complex, generally considered to be individual-specific multi-etiological heterogeneous disease. The common causes are: the role of mental factors, stress, infection, neurological disorders (visceral sensitivity increased)