There is no best way to correct O-legs, the correction method should be determined according to the patient’s specific condition, which generally includes medication, physical methods and surgery. Corrective methods vary from person to person and should follow the doctor’s instructions. 1. Medication: O-legs in infancy and early childhood are mostly related to calcium deficiency, and can be supplemented with calcium gluconate and vitamin D. If the patient is older, simple medication may not have significant effect. 2. Physical methods: It can be corrected through massage, physical therapy, acupuncture and so on. It can also be corrected by wearing orthotics, tying the legs, adjusting the walking posture, squatting correction method and so on. 3. Surgical methods: very serious O-legs need surgical treatment, such as wedge-shaped osteotomy in the tibia close to the high part of the joint and then fixation, and in severe cases, replacement of the knee joint. It is recommended to go to the regular hospital in time to identify the cause of O-leg and actively cooperate with the doctor’s treatment. Patients should pay attention to the posture when exercising and avoid sitting in a plank position and crossing the legs.