After anal fistula surgery, please have your medication changed by a professional healthcare worker; changing the medication on your own may not be effective and lead to complications such as infection, which will affect your recovery. Anal fistula surgery includes hanging thread therapy, fistulotomy, fistulotomy, etc. Regular dressing change is needed after surgery. If you change the medicine by yourself, due to the lack of professional knowledge and the concept of asepsis, it is likely to cause contamination of the wound, which not only fails to achieve the effect, but also causes infection, bleeding and so on. Therefore, please change the medicine after anal fistula surgery by professional medical personnel to operate -. The anus, as the final exit of feces, is one of the dirtiest parts of the human body, and the perianal area harbors a large number of bacteria, so the requirements for dressing change for wounds in the anus area are also more stringent. The dressing change needs to be sterilized several times from the outside to the inside and from the clean area to the contaminated area. In short, after anal fistula surgery, can not change the medicine by yourself, specific conditions follow the doctor’s instructions.