Osteoarthritis of the knee, also called degenerative arthritis, age-related arthritis, or commonly known as long bone spurs, osteophytes, aging joints, etc., is one of the most common diseases of the elderly, with an incidence of 10-20% in people over 60 years of age. Osteoarthritis seriously affects the quality of life of the elderly and causes pain to the patient. To treat osteoarthritis of the knee, it is important to first understand what pathological changes occur within the joint after osteoarthritis of the knee occurs. To give a more graphic example, the knee is like a bearing in a constantly running machine, and the meniscus inside the knee is like a spacer in the machine bearing. When the surface of a long-running bearing wears, the spacer inside the bearing may break or partially fall out, and the small pieces that fall out will add wear to the still-rotating surface of the bearing, causing the smooth surface to become uneven and eventually lose its function. The onset of knee osteoarthritis in humans is very similar to the breakage of a long-running bearing. The diagnosis is not difficult to establish through photographs and physical examination, but there are stages in the treatment plan. The early stages are often overlooked by patients because the joint is sometimes just a little uncomfortable, or fatigued, or sore, or slightly painful, and it goes away easily, so no one takes it seriously. But early on, starting to choose or change exercise regimens, keeping warm, using appropriate topical medications or starting glucosamine may make a difference in the outcome of the disease. Patients in the middle stage have multiple episodes and can also have swelling, but it all slowly goes down and gets better. Patients in this stage require medications or injections. The main drugs are non-steroidal anti-inflammatory drugs (Fotalin, Fenbendazole, Celebrex, etc.), anti-inflammatory painkillers are to be taken, anti-inflammatory can make the chondrocytes live in a better environment; also take glucosamine, which is not useful for the already bad cartilage, but useful for the chondrocytes that are not yet bad; also can be used appropriately closed, closed with good use has immediate effect, but can not be abused, will If there is a joint popping or locking, meniscus, free body jamming symptoms at this stage, it needs to be solved by arthroscopic surgery; also intra-articular injection of sodium hyaluronate, which has a similar lubricating effect; some patients already need surgery. The purpose of this phase of surgery is mainly to protect the good knee on the opposite side, because knee pain on one side tends to shift the weight to the normal side, eventually bringing the normal side down. This is why patients always say that the pain was only on one side and then it became pain on both sides. Patients with advanced disease are prone to flare-ups, which can occur at the drop of a hat and do not heal easily, even with medication. Deformity, inability to squat, limited joint movement, etc. can also be found. Patients in this stage should be treated surgically. This is because not only does one knee pain affect the opposite knee, but it also affects the lumbar spine, causing back pain, and because the pain reduces activity, the body resistance slowly decreases, and even obesity, which eventually gets worse. The first choice for surgical treatment is knee joint replacement, which can restore the knee joint to near normal function, no pain, no deformity, start visiting friends again, even travel, and increase self-confidence, so some people say that the knee joint gets a new life, in fact, the whole person gets a new life.