For X-leg and O-leg, this knee deformity is basically ineffective and non-existent when only 10 minutes a day are used to correct it. First of all, this knee deformity requires corrective measures depending on the cause. In the case of adolescents or children with knee deformities, they should be examined promptly and treated with vitamin D and calcium supplements. Adults with knee deformities need to wear orthopedic shoes with different heights on both sides of the sole every day to keep the forces on both sides of the knee joint unequal for a long time, so that mild deformities of the knee joint can be corrected. If the deformity is severe, external fixation of the knee joint may also be required, using straps to bind the knee joint for a certain period of time every day to correct the knee deformity to a certain extent, while too severe knee deformity can only be corrected through surgery.