At different ages of leg curvature, treatment methods are different, as follows: 1, children: especially children younger than one year old with leg curvature, that is, inversion or valgus of the knee joint, can generally use manipulative massage and other methods of manual correction, but also can wear braces, can come to correct the force line of the lower limbs. Children’s ligaments are more flexible, and conservative treatment can often achieve the desired results.2. Adults: If the knee is inversion or valgus in adults, surgical treatment, including osteotomy of the distal femur or osteotomy of the proximal tibia, can be considered to correct the force lines.3. Elderly: If the knee is inversion or valgus in the elderly due to degenerative osteoarthritis, an artificial joint replacement can be considered. Artificial joint replacement surgery can usually be considered to correct the force line.