After hanging surgery for anal fistula, there will be trauma in the perianal area, and you can lie flat, prone (i.e., lying on your back), or on your side, etc. after surgery. 1. lying down: after surgery patients lying down, if the pressure or friction of perianal trauma, thus appearing pain, and may even re-injure the trauma, and so on. Therefore, it is generally not recommended that patients lie down, and when they need to lie down, the wounds must be protected accordingly. 2. Prone: prone can keep the wound as breathable as possible without pressure, to promote wound healing. 3. side lying: side lying can also minimize the friction of the wound, as far as possible to ensure that the wound is breathable. After hanging anal fistula surgery can choose a variety of patients comfortable position, but there may cause wound injury posture is generally not recommended, follow the instructions.