Fear of defecation after anal surgery is also one of the main reasons why many patients with anal disorders are afraid of surgery. Many patients take it for granted that defecation is absolutely forbidden after anal surgery or that they cannot defecate for at least a few days; other patients say that “a living person cannot be suffocated by stool”, but worry that defecation will affect wound healing, so they try to make the stool as loose as water; some patients can barely sit on the toilet, and when a little stool is discharged, they think that they have accomplished an important task in life (due to fear of pain during defecation, of course). Some patients think that they have completed an important task in life (of course, also due to the fear of pain during defecation), and get up in a hurry, but then cause a sense of defecation or even affect urination. In fact, these botched attempts only end up aggravating the patient’s own pain. First of all, patients who undergo open anal surgery usually do not need to fast. The basis for fasting is that the surgeon has created an open – and well-drained – wound that allows the patient to defecate without allowing fecal residue to accumulate on the wound. So, is it necessary to make the stool thin and watery? The answer is also no. Too thin a stool will prevent a normal bowel movement from being completed. During a normal bowel movement, the anal canal senses the volume and weight of the stool, and then the anal canal moves as follows: 1) the external anal sphincter relaxes to open the anal canal, and 2) the internal sphincter descends to bring the mucous membrane at the end of the rectum (i.e., the anal pad or hemorrhoid tissue) to the anal opening. This process allows the skin incision in the anal canal to be completely open outside the anus, and the stool can be expelled without passing through the wound to the outside of the body. However, if the stool is too thin, this process cannot be completed properly and the (alkaline) stool will come in direct contact with the wound and cause pain in the anus during defecation. Some patients also defecate in the basin, and because of the small space of the basin, the patient actually clamps his buttocks to complete the defecation, which artificially causes the external sphincter to be unable to fully relax and the anus to be unable to fully relax, which will also cause increased pain during defecation. The painful defecation will inevitably cause the patient to defecate incompletely, and the accumulation of too much feces in the lower rectum for too long will cause the water in the feces to be excessively absorbed by the intestinal wall and cause fecal impaction. In this case, the patient shows: 1) a lot of bowel movements, but each time the amount is small, 2) a feeling of incomplete defecation, and 3) difficulty in urination. In fact, this is a type of constipation of surgical origin with outlet obstruction. Patients in this case should pay attention to several points: 1. Patients who do not have difficulty in defecation before surgery (defecation once in 2-3 days) should not use drugs that stimulate intestinal peristalsis (containing rhubarb, aloe vera, senna), nor should they use Dumic, etc. Instead, they should use glycerin enemas to empty the embedded stool in the intestinal cavity in time, and if necessary, dig out the stool by hand; 2. After the feces in the lower rectum is emptied, you should take appropriate oral defecation medication to make yourself defecate every day, and use anal suppositories for pain relief and laxative; 3. Patients who have difficulty in urinating must first ask their doctor to do an anal finger examination, and use medication to promote urination only when fecal accumulation in the intestinal cavity is excluded. The most critical thing is that even if the anus is operated on, the patient should take the most consistent with their normal bowel movements to defecate and not to disrupt the normal defecation process. This is the only way to minimize the pain of postoperative defecation.