The number of days in the hospital after surgery for anal fistula is mainly related to the complexity of the fistula and needs to be analyzed on a case-by-case basis. If the fistula is simple or low fistula, the fistula is shallow and the trauma is small, so the recovery time is usually fast, usually 5-7 days in the hospital and no other complications can be discharged home, but complete healing takes about 3 weeks. If the fistula is complex, the trauma is large and requires daily medication changes, tightening of the stitches every 3 days, and constant observation of the healing of the internal orifice, the hospital stay will be about 1-2 weeks. If the fistula is high, the trauma is large and deep, and the anal function is slow to recover, the patient usually needs to be hospitalized for 1 month or even longer. However, the specific length of hospitalization of the patient needs to go to the anorectal department of the hospital for examination and consultation before deciding, if the local hospital bed is more tight, it may be possible to be discharged home to recuperate after the condition has improved, regular change of medication and regular review can be done.