肠易激综合征 (irritablebowelsyndrome,IBS)是一种以腹痛或腹部不适及大便习惯改变为特征的慢性功能性肠道疾病 ,缺乏形态学和实验室异常的依据。功能性肠道疾病的发生可能与中枢神经系统、自主神经系统、肠肌间神经系统、胃肠道平滑肌和内脏敏感性改变等每一水平或相互间的功 Irritable bowel syndrome (IBS) is a chronic functional bowel disease characterized by changes in abdominal pain or abdominal discomfort and bowel habits, lacking the basis for morphological and laboratory abnormalities. Functional bowel disease may occur with the central nervous system, autonomic nervous system, the inter-myenteric nervous system, gastrointestinal smooth muscle and visceral sensitivity changes such as each level or mutual work