It takes about three months after the fracture surgery for the pain to disappear. This is because about five days after the fracture surgery, it is the edema period after the surgery, the edema gradually increases, about one week after the edema gradually decreases, the pain is not very obvious. In about two weeks, the wound gradually heals and the fracture scab gradually forms, and the pain basically disappears. However, when the fracture position is low, when the cast is removed for functional exercise, there may be a decrease in venous return, resulting in significant swelling and pain. However, when the fracture position is elevated above the heart level, gravity causes an increase in venous return and the swelling and pain will gradually decrease. With the gradual establishment of collateral circulation, blood circulation becomes smooth, venous return is significantly accelerated, and the swelling and pain will gradually disappear. When the lateral circulation is fully established and the blood circulation is well restored, the pain basically disappears completely at this time, and this time is about three months.