In fact, the old cold leg is what we usually call knee osteoarthritis, also known as degenerative arthritis of the knee, geriatric arthritis, is a very common disease in middle-aged and elderly people, because the disease will aggravate in the cold season, so the people also called the old cold leg. The old cold leg is mainly manifested by degenerative changes in joint cartilage and secondary osteophytes at the perimeter of the joint, which is more common in middle-aged and elderly people, especially women. When people reach a certain age, all organs of the human body will degenerate, and the cartilage of the joints is no exception. The articular cartilage will become thin, soften, lose elasticity, and even break, and the bone under the cartilage and the periphery will grow and form bone superfluous. In fact, in layman’s terms, that is, the joints have been used for many years, has been old, old, worn out, like the tires of a car, after a certain number of years will have problems. Pain is the most prominent manifestation of the old cold leg, and joint pain is characterized by increased activity and reduced rest. Joint pain is initially episodic, and can be triggered or aggravated by cold and mild trauma. Some people initially commit only once a year or two, but as the disease progresses the attacks become more and more frequent, and finally evolve into the pain of the knee joint every winter, “into the cold wind” and other discomfort. 1, pay attention to insulation, when the temperature drops suddenly must add clothing, especially the lower extremities of the knee joint protection. Pay attention to warmth is a simple and effective means of prevention and treatment, is the focus of the prevention and treatment of cold legs. Many beautiful ladies still wear thin stockings at this time, personally I think it is undesirable, love of beauty is in everyone, but do not sacrifice health. 2, the room should be kept warm, dry, bedding not too wet. 3, it is recommended that you can do some non-weight bearing aerobic exercise, such as swimming. 4, for those who do not have the conditions, you can carry out the exercise of the quadriceps muscle, see the following chart for details. 5, you can symptomatically take some anti-inflammatory and analgesic drugs orally, and use some creams or ointments externally, together with drugs for nutritional cartilage.