Taping can correct some of the O-legs. O-shaped leg is clinically known as inversion of the knee, there are physiological and pathologic. 1. Physiological inversion of the knee: mostly seen in infants and young children, as the body develops and matures, the inversion of the knee will gradually disappear, at this time there is no need to tie the leg to correct. 2. Pathological: if children’s knee entropion is caused by rickets, mildly it can be corrected by binding and fixing, which can be done by clamping soft cushion between ankles or fixing both legs with splints, and wrapping both lower limbs with ligature to straighten lower limbs, so as to correct the O-shaped leg. In adults, the epiphysis has already closed and cannot be corrected by tying the leg, so it can be treated by surgery, such as osteotomy or inhibiting the progress of the local epiphysis, in order to correct the O-shaped leg. If O-leg is diagnosed, it is recommended to go to the hospital in time for standardized treatment under the guidance of the doctor.