The first thing to understand is what is osteoarthritis of the knee? It is a multifaceted, multilevel, chronic inflammatory disease involving the bone, synovium, joint capsule and other structures of the joint, centered on the degeneration of the articular cartilage. It can be caused by a variety of different causes and eventually undergoes common pathological changes. Osteoarthritis mostly occurs in weight-bearing joints, and the knee joint is the largest weight-bearing joint in the body, so it is vulnerable to invasion. The onset of the disease is mostly due to cartilage wear caused by excessive loading, resulting in softening and degeneration of the cartilage, cracking and exfoliation, and thinning or loss of the cartilage layer, exposing the subchondral bone. Clinical symptoms are often manifested as follows: 1. Pain: mostly mild to severe dull pain, often tear-like or pinprick-like pain in severe cases, which is not relieved even at rest. Pain is characterized by initial pain, weight-bearing pain, active activity pain, and rest pain; 2. Swelling: can be caused by joint effusion or synovial hyperplasia, fat pad hypertrophy, etc. When joint effusion increases, the floating patella test can be positive; 3. Dysfunction: can appear to play soft leg, popping or rubbing sound, interlocking; in severe cases, joint stiffness, instability, flexion and extension range of motion is reduced, walking, squatting up and down steps function is weakened. Therefore, it mostly occurs in middle-aged and elderly people, obese and heavy manual workers, and sedentary and long standing workers. As a common disease, the recurrent knee pain, lower limb weakness, muscle atrophy and even knee deformity seriously affect the health and quality of life of middle-aged and elderly people. Therefore, the prevention and treatment of osteoarthritis of the knee is particularly important. Here we recommend a few prevention and treatment experience: 1, pay attention to the knee joint warm, prevent wind chill, rheumatism and fall injury, and pay attention to the combination of work and rest, do not prolonged knee weight-bearing activities; 2, the knee joint without weight-bearing functional exercise, such as lying flat on the bed, contract the lower limb muscles, slowly flex the knee joint to the maximum, hold 3-5 seconds, and so on, repeatedly, about 50 times a day, depending on the person in the calf plus sandbags Exercise. It should be noted that climbing hills, stairs, repeated squatting and standing can cause aggravation of knee osteoarthritis; 3, identify the evidence of the use of Chinese medicine fumigation and external application, such as cold and damp paralysis can be used to add a reduction of fumigation and external use; 4, small needle knife therapy of the knee joint, with significant efficacy, small trauma, can be treated as you go; 5, it should be noted that most of the knee osteoarthritis after rest, functional exercise and conservative treatment can be obtained For severe knee osteoarthritis, if conservative treatment is not effective, knee arthroscopy or even knee replacement surgery can be considered.