Osteoarthritis is the most common form of arthritis and is the leading cause of impaired mobility in older adults. It is estimated that in 2020, osteoarthritis will account for 25% of the adult population in the United States, or more than 50 million people, and will be the leading cause of mobility limitations in people over the age of 40. OA can have a significant economic burden in addition to the well-known effects on mobility and quality of life, which can lead to depression and anxiety. The risk factors for the onset and progression of OA are diverse and include: age, gender, trauma, obesity, metabolic dysfunction, and environmental and genetic factors. In the past 20 years, although there have been very thorough studies describing the pathological mechanisms of OA, further exploration is needed to fully understand its causes and progression factors. There is now a consensus on the role of mechanical abnormalities on knee osteoarthritis, and it is generally accepted that the three major pathological factors in influencing osteoarthritis are: the flatness of the joint surface, the stability of the joint, and the biological force lines of the joint. For the knee joint, the greatest impact is on the force line of the joint, followed by the stability of the joint, while unevenness of the joint surface has the least impact. Patients who have joint surface wear but good joint stability and force line tend to have milder symptoms and can often obtain better long-term results with conservative treatment. There have been studies done by foreign doctors and published internationally (SCI). This is consistent with our clinical experience. Therefore, for more severe O-leg X-leg Knee hyperextension and flexion deformity, if you have pain around the knee joint from time to time, easily fatigued, and prone to leg pain and low back pain after labor are all hints that your leg shape is beyond our body’s tolerance range, you need to seek prompt medical attention.