When I am in the clinic, I often have patients come in with X-rays and ask, “Doctor, what should I do if I have a bone spur in my leg? On the X-ray, there is a bone spur on one side of the knee, and the medial and lateral femoral condyles are both bony and the intercondylar ridge of the tibial plateau is high. This is what the patient calls a “bone spur”. These patients are mostly older than 60 years old and have pain in both the medial and lateral knee joints, which increases with activity, especially when going up and down stairs, and can sometimes be triggered by changes in weather. On examination, there is pressure pain at the medial and lateral knees and at the knee eye, and the knee joint is still moving well. The diagnosis of osteoarthritis of the knee can be made on this basis. More than half of the middle-aged and elderly patients with knee pain in orthopedic clinics are suffering from osteoarthritis, which is called geriatric arthritis, or osteoarthritis or osteoarthrosis in medical terms. It is a chronic inflammatory disease with degenerative changes in joint cartilage as the core, involving bone and including synovial membrane, joint capsule and other structures of the joint in various degrees. Bone spurs in the joints are one of the pathological changes. Risk factors for the disease include manual laborers, hypertensive patients, women, over 50 years old, and obese patients. The main symptoms include joint pain, intra-articular effusion, joint deformity and functional limitation. On X-ray, joint space narrowing, subchondral bone sclerosis and periarticular bone formation (bone spur) are seen. The formation of bone spurs is considered to be an inevitable manifestation of the aging of the body and joint degeneration, and joint degeneration and bone spur formation will occur at a certain age, so the bone spurs themselves do not need to be treated, nor can they be treated. There are currently two types of treatment: conservative treatment and surgery. Conservative treatment includes proper rest, functional exercise, weight loss and dieting for those who are overweight, massage, physical therapy, oral anti-inflammatory pain, Fotarine tablets and other medications, and intra-articular drug injection therapy. Different therapies can be chosen according to the different conditions of the patients. However, all treatments are aimed at reducing pain and slowing down the progression of the disease, and it is not possible or necessary (unless surgically removed) to reduce the “bone spurs” that have grown. It is worth mentioning that intra-articular injection of sodium hyaluronate is a new type of treatment that has emerged in recent years and is reliable, unlike the previous closed therapy, it is not a local application of hormones and has no significant side effects. Sodium hyaluronate is the main component of synovial fluid and is a new biomaterial with high molecular weight and high viscoelasticity. Studies have shown that various pathological changes in arthritis are closely related to the decrease of hyaluronic acid and changes in its physicochemical properties. The injection has the following effects: covering the surface of joint cartilage, which can protect the joint cartilage and prevent or delay further degeneration; protecting the synovial membrane of the joint, removing pain-causing substances and having a significant effect on reducing pain; lubricating the joint, improving the contracture of the joint and increasing the mobility of the joint; improving the synovial fluid of the degenerated joint. After the injection, most patients feel that the pain is reduced, the joints are lubricated, and the activities are significantly easier. For elderly osteoarthritis pain is obvious, in the basic therapy with intra-articular joint fluid extraction and joint cavity injection of sodium hyaluronate, once a week, three times for a course of treatment, the author clinical application of hundreds of cases have received good results.