How many centimeters can be increased by O-shaped leg correction is decided according to the person’s age and the degree of knee inversion, generally 1~5 centimeters. Children and adolescents, epiphysis is not completely closed, O-shaped leg, can be physically corrected, wearing a brace or surgical correction, to restore the lower limb force line, with the growth of age, compared with the growth and development of the uncorrected, can be increased by 2 ~ 5 cm. Adult epiphyseal closure, O-shaped leg is usually seen in elderly patients with osteoarthritis of the knee joint, cartilage wear and tear, which can only be corrected by surgery. Corrected height depends on the degree of knee inversion, generally through the force line correction, can be increased by 1 ~ 2 cm. O-shaped leg is recommended to actively seek medical attention and treatment under the guidance of a physician.