Whether the low subcutaneous fistula recovers quickly is related to the patient’s postoperative recovery, and the trauma usually recovers gradually after 10 to 20 days. Subcutaneous anal fistula, a kind of low simple anal fistula, belongs to the common pathologic changes of old anal fissure. The disease is mostly due to the recurrence of old anal fissure, resulting in the formation of fistula wound by bacterial infection, generally recommended through surgical treatment. As the wound is open and susceptible to bacterial contamination, the healing cycle is relatively long, so the wound can generally heal gradually after 10-20 days. It is recommended that patients change the medication regularly after surgery to keep the drainage smooth and prevent the recurrence of anal fistula after surgery. If you have any discomfort symptoms, you should go to the hospital in time, under the guidance of the doctor to choose the appropriate treatment program, so as not to delay the condition.