慢性腹泻是一种病因复杂的常见病。目前大多学者认为,一些长期的顽固性腹泻可能与遗传和自体免疫有关。本病的主要特点是:1.长期腹泻,轻者每天大便三、四次,重者十到二十次或更多,可持续几月甚至数年。2.发作性腹痛多在左下部腹绞痛,排便后可缓解,病变在直肠者有里急后重感。3.粘液脓血便轻者大便中伴有粘液或脓血,重者只排粘液脓血而无大便,有时还混有坏死组织残块。 Chronic diarrhea is a common cause of complex causes. At present, most scholars believe that some of the long-term intractable diarrhea may be related to genetic and autoimmunity. The main features of this disease are: 1. Long-term diarrhea, light stool three or four times a day, weight ten to twenty times or more, sustainable months or even years. 2. episodes of abdominal pain and more in the lower left colic, defecation can be alleviated, the disease in the rectum after a tenesmus. 3. Mucus purulent light stool accompanied by mucus or pus and blood, severe mucus only pus and blood without stool, and sometimes mixed with necrotic tissue debris.