Patients who have mucus in the anus after stool may have enteritis, including colitis or proctitis, and in severe cases, it may be colon and rectal polyps, or even colon and rectal cancer, because clinically, the common diseases that have mucus after stool mainly include inflammatory diseases of the intestine, neoplastic diseases, and polyposis, so it is necessary to do further colonoscopy to make a clear diagnosis, which are as follows: 1. Inflammatory bowel disease: Inflammatory bowel disease can be alleviated and cured by regulating the intestinal flora, eating more fresh vegetables, fruits and other high-fiber foods, keeping the stools loose and smooth, and developing a good habit of having a bowel movement once a day.2. Intestinal space-occupying lesions: Especially, we need to be alert to intestinal space-occupying lesions, including neoplastic diseases or polyps, which need to be timely resected by surgery and sent to the pathological examination to exclude the possibility of malignant changes. It is necessary to perform timely surgical resection and send it to pathological examination to exclude the possibility of malignant changes. If malignant lesions are confirmed, radical resection for intestinal cancer should be added and combined with postoperative chemotherapy, radiotherapy and other comprehensive treatments, so as to improve the cure rate.