The pain will last about 3-7 days after patellar fracture surgery. In the case of severe patellar injury, the soft tissue damage is also heavier and the pain lasts slightly longer, possibly about 7 days. The pain can be relieved by taking pain medication or local ice packs to improve the local condition. In addition, when the patella fracture pain also need to do functional exercises of the muscles of both lower limbs, active muscle contraction to prevent deep vein thrombosis and muscle atrophy, because the postoperative deep vein thrombosis is more terrible, so even if there is pain, we should apply pain medication to overcome the difficulties to properly practice the function of both lower limbs.