Leakage of intestinal fluid may be caused by prolapse of rectal mucosa, anal sphincter relaxation, hemorrhoids and anal fistula. 1. Rectal mucosal prolapse: most patients have defecation problems, i.e. constipation, usually due to too much force during defecation, resulting in peristalsis of the internal and external rectal sphincter muscles are not coordinated, which leads to rectal mucosal prolapse, and intestinal fluids continuously flow out of the anus. 2. Anal sphincter relaxation: once the anal sphincter relaxes, the control of stool will be insufficient, easily causing fecal incontinence, accompanied by intestinal fluid leakage, can be prevented by doing more anal exercises. 3. Hemorrhoids: common in internal hemorrhoids and mixed hemorrhoids, hemorrhoids surface mucous membrane secretions can flow out of the anus, resulting in perianal itching. 4. Fistula: If there is a fistula in the rectum, part of the intestinal fluid can be discharged directly through the fistula, also belongs to the intestinal fluid leakage. The situation of intestinal fluid leakage, there may be rectal polyps, rectal tumors and other factors. It is recommended to consult a doctor in time, improve the examination, make a clear diagnosis and carry out the corresponding treatment.