After the fracture cast fixation also appears pain, the most common are the following reasons: 1, although the fracture temporary fixation, but the moment of injury, the fracture for the surrounding soft tissue damage still exists, and the damage recovery is slow, pain will continue for a long time. 2, after the fracture cast fixation, the early fracture site swelling will still be further aggravated, swelling will also further produce pain. 3. In the late stage of fracture fixation the swelling has subsided and there is a possibility that the cast will loosen, at which time the fracture is not fixed firmly, so pain will also occur. No matter which of the above is the cause, as long as the pain is getting worse, you should actively go to the orthopedic department of the hospital for a review and have the doctor replace the cast or take other fixation methods to solve the pain.