Surgery for hemorrhoids is not sutured. Surgery around the anus is not only for hemorrhoids, but also for anal fissures, perianal abscesses, and anal fistulas, all of which cannot be sutured, leaving the wounds open, and then slowly growing back, and these diseases are considered cured. Because the anal area is the place where you have to pass stool every day, the place itself is dirty and the stool contains all kinds of bacteria, which can easily lead to infection. If the wound is stitched directly, it is difficult to sterilize the wound thoroughly, and if bacteria are stitched into the wound, it is easy to cause infection of the incision. In addition, you have to pass stool every day, and if stool enters the incision, it is also very easy to cause infection. So this place to keep the incision open, and then change the medicine every day, can also keep the drainage of the incision open, can clean out the dirtier things at any time, can ensure that the wound heals well.