There are many causes of leg deformation, there are usually the following situations: First, long-term incorrect sitting posture, such as often crossed legs, cross-legged and other postures, or often do strenuous exercise, resulting in misalignment or damage to the bones of the legs, over time will make the legs deformed. Second, chronic wear and tear of the joint cartilage of the leg or osteophytes will cause osteoarthritis in the leg, which will also cause deformation of the leg. In this case, the patient will also feel pain, the patient can take oral anti-inflammatory, pain medication to relieve. Third, long-term calcium deficiency makes the development of bones slow, followed by the phenomenon of leg deformation. Fourth, especially obese patients due to long-term weight pressure, will also lead to bone deformation.