After several years of patella fracture, it suddenly becomes more and more painful, considering the local bony encumbrance friction soft tissue, patellofemoral arthritis. After healing of patella fracture, due to the formation and modification of bone scab, osteophytes can be formed locally in the patella, and the osteophytes can rub the ligament and tendon at the patella, forming local aseptic inflammation, resulting in local pain, which can be accompanied by localized swelling. Patella fracture, if the fracture end is not aligned neatly, after healing, there can be patellar articular surface step, the continuous activities of the knee joint, the patella and femur and tibia friction, damage to the patellar cartilage, resulting in patellofemoral arthritis, and ultimately the formation of patellofemoral bone-to-bone contact, along with the activities of the knee joint, the pain at the patella is aggravated. Patella fracture healing more and more pain, it is recommended to actively consult the doctor, physician guidance under the treatment.