Difficulty in bowel movement after colon cancer surgery may be caused by impaired intestinal function, or it may be caused by recurrence of colon cancer, anastomotic obstruction and other etiological factors. 1. Impairment of intestinal function: the purpose of colon cancer surgery is to remove the diseased intestines, which may lead to the impairment of intestinal function, thus causing difficulty in bowel movement after surgery. 2. Recurrence of colon cancer: if colon cancer recurs and the enlarged tumor presses the intestine or blocks the intestine, it may also cause postoperative bowel difficulties. 3. Anastomotic obstruction: if the anastomosis is infected, edema and other reasons cause anastomotic obstruction, it may also cause postoperative bowel difficulties. There are many other causes of postoperative dyspareunia after colon cancer surgery, so attention should be paid to timely consultation to find out the causes of the disease and follow the doctor’s instruction for further treatment or therapy.