Comparatively speaking, it is better not to have pus after anal fistula surgery, if the incision is an open incision and there is persistent pus, it is possible to miss the treatment of the inner mouth, whether there is still the possibility of fistula. In addition, because the open incision will have continuous oozing, so it will also lead to pus flow symptoms, so compared to no pus flow is definitely better than pus flow. If there is only a small amount of oozing and no pus after anal fistula surgery, it means that the wound is relatively clean, and it also means that the fistula as well as the treatment of the internal opening should still be relatively accurate, and generally will not recur after surgery. But this judgment is not absolute, specific should be combined with the healing of the postoperative wound.