Fear of defecation after anal surgery is 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 they worry that defecation will affect wound healing and try to make the stool as loose as water; some patients barely sit on the toilet, and a little stool is discharged and they think they have accomplished an important task in life. Thinking that the completion of the important task in life (of course, also because of the fear of pain when defecating), hurriedly get up, but caused always have a sense of defecation and even affect the 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. This is based on the fact that the open wound is well drained to ensure that the patient can pass stool 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 feces 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 the space of the basin is small, 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 also causes 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 stool in the lower rectum is emptied, they should take appropriate oral medication to defecate. The patient who has difficulty in urinating must first ask the doctor to do an anal finger examination and use medication to promote urination only after excluding the accumulation of feces in the intestinal cavity. 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.