Indications: osteoarthrosis of the knee, meniscal injury, patellar tenderness, patellofemoral arthropathy, rheumatoid arthritis knee lesions, synovitis effusion, etc. At the same time, muscle training is particularly important after artificial knee arthroplasty and needs to be adhered to for a long time after surgery. Specific exercise movements: hooked leg lift exercises, sitting on a stool or sitting on the side of the bed to train, each time insist on 10 seconds, then relax for 10 seconds, and then continue training. If both sides have the disease, you can alternate both knees, not both sides at the same time. Perform 30 reps daily in the morning and 30 reps in the afternoon. Usually 6 weeks of training will result in significant pain improvement. (Note: Patients with lumbar spine lesions can only practice sitting, do not lie down to do so, so as not to induce lumbar pain) If the effect of analgesia and swelling is obvious, then continue to insist on training for 6 weeks (3 months in total). Then hang a half-pound sandbag or rice bag at the neck of the foot and continue to insist on the leg lift training in the morning and afternoon. Medication aid: For patients with osteoarthrosis and osteophytes of the knee joint, use the aid in conjunction with muscle training — glucosamine + herbal pellets for 6 weeks to 3 months. If the knee joint is swollen and painful, synovitis and painful symptoms are obvious, be sure to add non-steroidal anti-inflammatory and analgesic drugs again. Patients with diseases in the gastrointestinal tract can choose drugs such as COX-2 inhibitors in order to reduce side effects. The principle of taking these drugs is to take them after meals. If there is obvious gastrointestinal discomfort after taking them, you can temporarily stop taking them for a few days and then resume taking them. If there are still obvious side effects after taking them again, you can only choose to stop taking them or change the medication. Indications for intra-articular injection of sodium hyaluronate: knee joint feeling stiff, joint inflexibility, rusting and rubbing sensation. Intra-articular injections should be used with caution or contraindicated in cases where the joint is already significantly swollen and there is fluid accumulation in the joint cavity. Exercise recommendations: Activities that should be reduced or avoided include: stair climbing, mountain climbing, squatting, half squatting (such as tai chi), long distance walking (meaning more than 30 minutes), and other activities that are injurious to the knee joint, especially do not do stance against the wall. Suggested activities include short walks (less than 30 minutes), slow dancing, cycling, swimming in a hot tub or soaking in a hot spring. Special attention should also be paid to keeping the knee joint warm, as symptoms often worsen if it gets cold. Arthroscopy and Artificial Knee Arthroscopy is an option for patients with meniscal damage or free bodies in the joint cavity that cause locking symptoms (i.e., a “tripping” sensation) when walking, or when the arthritis is mild. Examination and treatment. For patients with severe osteoarthritis, where the medial or lateral joint space is significantly narrowed or lost, and the knee joint has developed significant deformities such as inversion and flexion contracture, an artificial knee replacement should be performed as soon as physically possible. Special note: As long as the knee joint can be fully extended, even if the arthritic symptoms are severe, there is still a chance for conservative treatment. Once the knee joint cannot be flexed to straighten the leg and a flexion contracture occurs, it often indicates that the patient has reached a stage where surgical treatment is necessary. This reinforces the importance of doing quadriceps exercises with a hooked leg raise.