Asymmetry of the leg crease may suggest the existence of hip joint developmental abnormality or hip joint dislocation, which needs to go to the hospital in time and be corrected by fixation method or surgery method under the guidance of the doctor. When there are structural deformities of acetabulum, proximal femur and joint capsule, it will cause instability or even dislocation of hip joint, which will lead to asymmetric skin folds on both sides of inner thighs, and requires early treatment, and the earlier the treatment, the better the result. Its treatment is age-related, and either fixed or surgical methods should be chosen according to the patient’s age and pathological changes. Neonatal period is the golden period for the treatment of this disease, only need to use the fixation method to make the hip joint in the abduction and flexion position, can get better results. In infancy, closed or incisional repositioning is required, and abduction support or plaster immobilization for 3~6 months. In early childhood, incisional repositioning with pelvic or femoral osteotomy is often used. Childhood and beyond is usually treated with surgical cut and repositioning, pelvic osteotomy, and proximal femoral osteotomy.