For high anal fistulas, we opt for the seton therapy, where we typically use rubber bands as the thread. For the rubber bands used in seton therapy, we believe it is best if they fall off around ten days. Therefore, for the anal fistula rubber bands, we think it is ideal if they fall off in about two weeks at the latest. If they have not fallen off after about two weeks, we may consider further interventions such as cutting the thread or directly cutting the sphincter muscle.