基于肠道微生物，对常见的3种胃肠道疾病，即腹泻、便秘和肠易激综合征的发病原因、特征以及相对有效的治疗手段进行综述，包括临床上已证实安全有效的中药治疗方法和微生态制剂干预疗法。旨在探讨中药及微生态制剂对以腹泻、便秘、肠易激综合征为典型的胃肠道疾病的作用及其机制，为更合理、有效地治疗胃肠道疾病提供参考。

Based on intestinal microorganism, this paper reviews the etiology, characteristics, and relative effective treatments of three common gastrointestinal diseases, namely diarrhea, constipation, and irritable bowel syndrome. The treatments include Chinese materia medica and microbiological agents, which have been proved to be safe and effective in clinic. The article aims to explore the role and mechanism of Chinese materia medica and microecological preparations in gastrointestinal diseases by taking diarrhea, constipation, and irritable bowel syndrome as examples, and to provide a reference for the treatment of gastrointestinal diseases more reasonably and effectively.