The deformity can be self-corrected during the growth process; second, secondary factors, such as osteochondrosis, which is common in rickets; bone injury, which is common in epiphyseal injury and proximal tibial fracture; thinning of the medial articular cartilage, which is common in age-related osteoarthritis; stretched ligaments of the lateral knee ligament elongation, common in frequent horseback riders. Treatment includes bowed legs without a clear cause can often be self-corrected without special treatment, and attention should be paid to the correct use of diapers to avoid aggravation of the deformity. Infants can be fixed with orthopedic braces for the lower extremities to avoid deformity correction of inversion of the knee. After the age of six, surgery is performed for aesthetic reasons and to prevent arthritis. Two types of surgery are available: a U-shaped nail is placed on the outside of the distal femoral epiphyseal plate, and osteotomy of the upper tibia or femoral condyle is possible in adolescents.