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. The diagnosis is not difficult to establish through photographs and physical examination, but there are stages in the treatment plan. I can roughly divide osteoarthritis of the knee into early, middle and late stages. The early stages are often ignored 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. However, starting to choose or change the way you exercise, keeping warm, using topical medications or starting to take glucosamine in the early stage may change the outcome of the disease. Early photos are meant to be kept on file and can be compared later. If the first photo is a joint deformity, it is estimated that there is some difficulty in the progression of the disease. Patients in the mid-stage have multiple episodes and can also have swelling, but all slowly go down and get better. Patients in this stage need to take medication or injections. The main drugs are non-steroidal anti-inflammatory drugs (Fotalin, Fenbendazole, Celebrex, etc.), anti-inflammatory painkillers are to be taken, as soon as possible to reduce inflammation can make the chondrocytes live in a better environment; also eat glucosamine, which is not useful for the broken cartilage, but useful for the chondrocytes that are not yet broken; can also be used appropriately closed, closed with a good use of immediate effect, but can not be abused, can cause other problems; can also be closed joint. It can also be used to inject sodium hyaluronate into the joint cavity, 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 dragging it 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. Surgery is the first choice for knee joint replacement, which can restore the knee joint to near normal function, no pain, no deformity, start to go out for tea, visit friends, and even travel again, 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. I wish all elderly patients with degenerative knee arthritis a new life!