Doctor, my knee is painful and swollen, give me some painkillers, as long as I can go downstairs to buy groceries.” This was an old lady in my specialist clinic not long ago, with her hand over her knee joint, begging with a sad face. After examination and radiographs, the old lady was suffering from osteoarthrosis of the knee joint, which was already very serious although she was not yet 70 years old. In fact, in the orthopedic clinic, there are many patients with osteoarthrosis of the knee, and the majority of them are caused by the aging of the human joints. Just as age spots appear on the skin as people get older, it is common for older people to have aging knee joints, “bone spurs,” pain and swelling, except that many patients with osteoarthrosis of the knee have a very painful senior life. Osteoarthropathy is a chronic joint disease characterized by degeneration, destruction and osteophytes of the articular cartilage, and the knee is the most commonly affected peripheral joint in osteoarthritis. The main symptoms of this disease are pain, swelling, deformity and functional impairment. In the early stages, the pain and discomfort in the joint after walking for a long time may be relieved after rest, and when sitting down and suddenly getting up, there is a feeling that the joint is unable to eat, which may lead to severe pain in the joint. If the patellofemoral joint injury is also combined, the pain will increase when walking up and down stairs. As the disease progresses, the walking distance is gradually shortened and the pain time is gradually prolonged, until the pain does not stop even at rest, and the nature of the pain may develop from soreness to stabbing pain, and in severe cases, it may cause difficulty walking or limping. In terms of treatment, there are different treatment methods according to the different stages of osteoarthrosis of the knee. These include: rest, physical therapy, medication, injections, arthroscopy, joint replacement, etc. Doctors will take individualized treatment according to the course of the patient’s disease.