After anal fistula surgery plug gauze old fall, need to timely disinfection and change medicine, and then re-fill gauze, also to ensure that the bowel movement. 1. timely disinfection and medication: postoperative gauze after anal fistula old drop, may be related to local infection and inflammation, currently to scrub the wound as soon as possible with povidone-iodine for disinfection, if necessary, need to change the medication in a timely manner. 2. re-fill gauze: postoperative gauze always fall, may be related to the size of the inappropriate, you can re-fill gauze, so that it maintains a stable state, to prevent the continuation of shedding. 3. Keep the bowel clear: If the bowel is dry and hard after anal fistula surgery, it will stimulate the anus and cause the gauze to fall off, so you should ensure that the bowel is clear after surgery, so that the bowel passes through the anus smoothly. After anal fistula surgery you need to regularly wash the local area with warm water to ensure dryness and cleanliness and prevent secondary infection. If you find that the gauze is falling off, you should consult a doctor in time and deal with it under the guidance of a professional physician.