Adult O-shaped legs are mostly caused by long-term bad posture or rickets and other factors, usually through conservative treatment or surgical treatment to correct. 1. Bad posture: If O-shaped legs are caused by long-term bad walking habits or heavy physical labor, first of all, we should correct the bad walking posture, change the unhealthy labor habits, by exercising the inner leg muscles, while massaging the outer leg muscles, so that the tense muscles are relaxed, and in severe cases, we can wear the appropriate braces to correct. 2. Rickets: it occurs in children, with vitamin D deficiency as the main reason, due to the lack of active correction at a young age, resulting in the formation of O-shaped leg deformity in adulthood, daily need to strengthen the nutrition, especially to increase the intake of vitamin D, and at the same time, wear orthodontic correction. If the O-shaped leg deformity is serious and affects the image or life and work, surgery is needed to correct it. Once O-shaped legs are found, patients need to go to the hospital for examination to clarify the severity of O-shaped legs and choose the appropriate treatment plan.