The pain symptoms are more serious after one week of fracture, and the following reasons are common: 1. If manual repositioning and external fixation of the cast are used, the swelling does not subside in time after one week, which may lead to too tight fixation of the cast, affecting blood circulation and nerve conduction, and the patient will have obvious pain symptoms aggravated. At this time, the blood supply of the distal limb should be checked in time, and if there is any blood supply disorder, the cast should be removed and refixed in time, otherwise it may produce serious consequences such as ischemic muscle contracture.2. If internal fixation with incision and repositioning is used, if the patient’s rehabilitation exercise is not carried out in time in about a week, it may lead to a slower recovery of soft tissue injury, which may cause an increase in pain symptoms when activities are carried out at this time. Therefore, functional exercises should be started about three days after fracture surgery to promote swelling and injury repair, so that the pain symptoms can be relieved continuously.