Anal fistula tightening refers to the tightening of the rubber bands used in anal fistula surgery to ensure the original feeling of cutting and tightness, allowing the fistula to heal as it is cut. An anal fistula hanging wire procedure is indicated as a common method of treating anal fistulas, and can be used to treat complex or high level anal fistulas. The procedure involves sterilizing the fistula site, then using a rubber band to bind the fistula in the area and allowing the band to cut the fistula. Rubber band cutting process is relatively slow, if the cutting tissue becomes loose, you need to tighten the rubber band, there is a sense of tautness to ensure that the rubber band cutting effect, but can not be quickly tightened, you need to little by little force. To the end of the fistula completely cut open, the rubber band also completely off, anal fistula hanging line treatment is over. After the anal fistula hanging line surgery, in the process of healing, if you find that the rubber band has no tightness, the patient can not tighten the line, you need to go to the hospital in a timely manner, by a professional doctor to tighten the line. It is important to do a good job of postoperative care, changing medication and tightening the line, actively cooperate with the doctor’s treatment, to reduce the chances of recurrence of anal fistula.