There are more diseases that can develop in the rectum, so the time it takes for the stool to become normal after the surgery varies. In special cases, when a rectal resection is performed, the stool may not become normal. Diseases of the rectum are mainly classified as benign diseases or malignant tumors. 1, benign diseases are more often polyps these diseases. This disease is easier to deal with due to the different states of polyps, and different methods such as colonoscopic ligation and electrocautery. This easier to deal with disease, the stool will usually return to normal very quickly, usually not more than a week or so. Some polyps may require open surgery due to special circumstances, in which case it will take a long time to recover due to intestinal function, sometimes taking no less than a month or so. 2.Proctal cancer is the most common malignant tumor of the rectum, and according to the location of rectal cancer, anal preservation surgery, or abdominal perineal union, and some other surgical methods will be taken. Generally speaking, most of the rectum and part of the colon will be removed during rectal cancer surgery. With the absence of these anatomical structures, the stool will generally become diluted and more difficult to return to normal, and the more intestinal tubes removed, the less likely the stool will become normal. Rectal cancer involves surgery that cannot preserve the anus, usually with an anal fistula, in which case it will be difficult for the stool to become normal. Whether and how long stools can become normal after rectal surgery has a lot to do with the rectal disease itself and the surgical procedure.