Osteoarthritis (OA), also known as degenerative osteoarthritis, often involves the knee joint and is a common occurrence in middle-aged and elderly patients, accounting for about 40% of all types of osteoarthrosis. Clinically, osteoarthritis of the knee (KOA) is the most common. Osteoarthritis of the knee belongs to the category of “paralysis” and “bone paralysis” in Chinese medicine. In the early stage, joint pain and morning stiffness are the main symptoms. In the late stage, it is characterized by persistent pain, joint swelling, deformity, and limited movement. The patient suffers a great deal of pain and the new family is burdened. Knee pain causes: 1, weight bearing and sports The knee is the largest joint in the human body, it is burdened with the weight of the whole body, in sports and work to bear several times the weight of the whole body, overload work, athletes overload training, so that the joint overwork wear and tear, body fat, overweight people are even heavier burden. 2, joint injury such as knee ligament injury, fat pad injury, meniscal injury, traumatic synovitis, osteoarthritis of the knee, etc. can cause knee pain. 3, wind, cold, damp, evil attack Because of the poor blood circulation in the knee, it is easy to be attacked by wind, damp and cold evil, which can injure the knee joint. Such as wading in deep water, showering after exercise, sitting and lying on wetlands, fishermen working at sea, farmers working for a long time in the shed, working in cold storage lack of protection, soldiers on duty in the snow or riding motorcycles cold wind blowing joints, lesbians wearing short skirts in winter or cold lower limbs after menstruation and childbirth, etc. are vulnerable to wind, cold and damp attack and disease. 4, degenerative changes with age, the body’s organs gradually decline in function, the joint cavity mucus secretion is reduced, joint cartilage dry, gradually wear, thinning, joint osteophytes coupled with physiological atrophy of the muscles around the joint, ligament elasticity weakened, the knee joint mobility gradually declined. As we age, bone mass decreases and osteoporosis occurs. This decreases the load-bearing capacity per unit area and leads to degeneration. All of the above factors can gradually lead to different conditions of pain with impaired joint movement. Treatment of osteoarthritis of the knee: When osteoarthritis of the knee occurs, it is necessary to go to a specialized hospital and ask a doctor for proper treatment. In the worst cases, joint cavity drug injections are used, as well as acupuncture treatment in combination with Chinese medicine. For poor results, arthroscopic debridement may also be used. If this is not possible, artificial knee replacement is feasible. Prevention of osteoarthritis of the knee: daily life herbal medicine pay attention to the protection of the knee joint, pay attention to the combination of work and rest, the combination of static and dynamic, can do light aerobic exercise. Such as: walking, playing tai chi, five birds play, etc., avoid long frequent up and down stairs, running, climbing. Older people should avoid falls and sprains, pay attention to knee warmth, and lesbians should pay attention to menstruation and maternity health care to avoid dampness and cold, and avoid painful and violent knee exercises, so as not to increase wear and tear on the knee and sprain, causing more pain. May the middle-aged and elderly friends are physically and mentally healthy to make their later life more happy and harmonious.