As the saying goes, people age before their legs do. The knee joint, located in the middle of the thigh and calf, is the most sensitive area of the body that is prone to aging. The knee joint is the largest and most complex of all the joints in the body, and is the main structure of the body’s activities, the “link” and “bridge” to the bones. In addition to bearing the majority of the body’s weight, the knee joint plays a major role in people’s daily lives and is the most important of all the joints in the body. Most of the clumsy movements of the human body in old age are caused by certain pathologies in the knee joint. Therefore, taking care of the knee joint plays a pivotal role in the health care of the elderly. After middle age, degenerative changes occur in various organs of the body. Tendons and ligaments often become lax and weak after degenerative changes, and the synovial fluid secretion in the joint cavity decreases, making it easy for fibrous adhesions to occur due to long-term friction in and out of the knee joint. Therefore, some elderly people often feel stiffness, inflexibility, and even pain in the knee joint. Some elderly people also make a “banging” sound when they move their knee joints. Most of these phenomena are a sign of premature aging of the knee joint and are often related to improper maintenance of the knee joint during middle and old age. Unlike other joints, the knee joint is not protected by abundant muscle and fat tissue, but is a “skin and bone” area where local heat is often in short supply. If the knee joint is stimulated by cold or cold for a long time, the blood supply may be reduced because of local vascular spasms and contractions, thus weakening the metabolism and immune defense of the cartilage, causing ischemia and even necrosis of the cartilage surface, resulting in aseptic inflammation and synovitis of the knee joint. Once synovitis has developed, treatment often provides only temporary relief and is difficult to heal completely. Therefore, the elderly should always take appropriate measures to keep their knee joints warm according to changes in temperature and humidity. It is best to wear cold-proof cotton pants for winter cycling. When playing cards, chess or mahjong for a long time in a cold environment, do not sit for a long time, but stand up and walk for a while at intervals to move the knee joints, or use your hands to massage the knee joints to promote blood circulation in the knee joints, thus reducing adhesions in the internal and external tissues of the joints. For middle-aged women who love beauty, try not to wear skirts in winter or on rainy days. If there is a special need to wear a skirt, you should wear a long and thick skirt made of wool or tweed to keep the knee joint free from cold stimulation. In addition, the knee joint is most afraid of moisture, so middle-aged and elderly people should not sleep in damp places, and do not immediately flush the knee joint with cold water when they sweat a lot on hot days to prevent local vasoconstriction, which affects the blood circulation of the knee joint. In addition, middle-aged and elderly people should always do alternate squatting and standing activities to prevent premature stiffening and straightening of the knee joint. People who usually participate in more intense physical activities should gradually reduce the amount of exercise after entering middle age. Before exercising, you should move your knee joint for 1 to 2 minutes to relax the joint and prevent accidental knee injury during exercise. The middle-aged and elderly people should insist on running to enhance the elasticity of the joint ligaments, but they should not run too fast and not use too much force when stepping on the ground. It is best to use the front part of the foot to land first when running, which can cushion the vibration of the leg and prevent knee injury. Older people with osteoarthritis should pay special attention to weather changes because the cold climate in winter can aggravate joint pain symptoms and make it difficult for you to move. At this time, you should avoid excessive joint activity or holding heavy objects to avoid joint strain and re-injury. In the acute phase of severe pain, you should limit activities, moderate exercise or bed rest, local hot compress, massage, physical therapy can reduce the symptoms, coupled with the Tongluo tablets, active tablets (pills) and other medication, you will definitely achieve more satisfactory results. If the knee pain is not relieved by the above treatment, you are advised to go to a regular hospital for treatment.