Many elderly people often say that their knee pain, especially when the pain is particularly pronounced up and down the stairs, is not osteoporosis or rheumatism? Shouldn’t they move their knees more often to strengthen the exercise? In fact, it is more likely to be suffering from degenerative knee osteoarthritis, which is caused by degeneration of the knee joints of the elderly, also known as osteoarthritis of the knee joints, proliferative knee osteoarthritis, senile arthritis, is the most common chronic disease. Due to degeneration and destruction of knee cartilage, sclerosis of subchondral bone, reactive hyperplasia of joint margins and subchondral bone, it produces swelling and pain in the knee joints, resulting in painful obstruction of walking, going up and down stairs, and squatting. Although the disease progresses slowly, severe degenerative knee osteoarthritis can lead to loss of walking function of the knee. The normal knee joint has a thin but friction-resistant layer of hyaline cartilage on the surface, which is very important in the movement function of the knee joint. The knee joint is the earliest joint in the human body to deteriorate due to heavy loads and movement. 45 years of age or older, due to the decline in hormone levels, the hyaline cartilage of the knee joint deteriorates and atrophies, and coupled with daily injuries, the cartilage is susceptible to localized necrosis. At this time, the body will repair the necrosis through a variety of reactions, including exudation of joint fluid, but the exudation of joint fluid is acidic, not only is not conducive to repair, but also the formation of a variety of chemical inflammatory mediators irritation source, causing a series of symptoms such as swelling around the joints, pain, and walking difficulties. At present, there is no specific treatment, through the needle knife loosening treatment to relieve pain, can also be taken orally anti-inflammatory analgesic, promote cartilage healing of the joints, with acupuncture, massage and physiotherapy methods to make the muscles around the joints, ligament relaxation, and promote the elimination of inflammation. On the other hand, it is the appropriate functional exercise of the knee joint, for example, straightening the legs horizontally in the air, and stirring the feet up in the supine bed. Some patients mistakenly believe that knee degeneration is mainly caused by insufficient exercise, so often climb stairs, running, playing Tai Chi, etc. to strengthen the knee joint movement, in fact, this is more heavy knee joint burden, exacerbate joint friction, and progress to accelerate the degeneration of cartilage. Therefore, when suffering from knee osteoarthritis, do not blindly carry out sports that damage the joints, and must find a professional doctor to treat and follow the doctor’s guidance to carry out functional exercises.