It is very normal clinically to have cramps easily after a fracture injury, mainly due to the following reasons: First, there is a long time pain stimulation after the fracture itself, which leads to muscle spasm with cramps. Second, even if the pain gradually disappears, because the fracture of this leg does not move freely like the normal leg, a long time a fixed posture inactive, can also cause the symptoms of cramps. Third, unlike the normal leg, if the fracture is slightly exposed to wind or cold, the muscle tension, spasm and contraction of the whole leg will be more obvious than the normal leg, and the process of cramping will occur. Therefore, after the pain gradually disappears, you should change the posture of the whole leg and do more activities that you can do, in addition to avoid being exposed to wind and cold, and pay attention to keeping warm.