What are the imaging findings of osteochondrosis of the femoral head? X-rays show increased density of the femoral head, fragmentation and flattening of the epiphysis, thickening of the femoral neck and partial dislocation of the hip joint. The radiographic manifestations are closely related to the pathological process; radionuclide bone imaging shows negative radiographs in the ischemic phase of the pathology, while bone imaging can already detect radioactive sparing. If the ratio of the affected side to the healthy side is less than 0.6, it is considered abnormal, and its early diagnosis accuracy rate is more than 90%. How is osteochondrosis of the femoral head treated? The aim of treatment is to maintain an ideal anatomical and biomechanical environment to prevent deformation of the femoral head during the period of blood supply reconstruction and healing. To this end: (1) complete inclusion of the femoral head in the acetabulum; (2) avoiding confining compressive stresses on the femoral head by the upper outer edge of the acetabulum; (3) reducing the pressure on the femoral head; and (4) maintaining a good range of motion of the hip joint. Specific methods: ① Non-surgical treatment: fix the affected hip with a brace in a 40° abduction and mild internal rotation position. During the day, the brace is used to move out of bed with a double crutch, and at night, the brace is removed and placed between the legs with a triangular pillow to maintain the abduction and internal rotation position. The brace is used for about 1 to 2 years, and the lesions are periodically X-rayed until the femoral head is completely reconstructed. In addition, the traditional hip herringbone cast fixation method is still a simple, easy and cost-effective treatment method in many areas of China. The fixation position is the same as that of the brace, but it should be changed every 3 months to observe the efficacy on the one hand and to adapt to the growth and developmental changes of the child on the other. The child should be allowed to rest for 1 week between plaster fixation and to carry out functional training of hip and knee joints in order to reduce the occurrence of joint stiffness and articular cartilage degeneration. The total duration of plaster fixation is the same as that of the brace, and non-surgical treatment is mostly effective in early cases; ②Surgical treatment: including synovectomy, epiphyseal drilling, subtrochanteric internal rotation, internal rotation osteotomy, pelvic osteotomy and vascular implantation. For different periods and ages of lesions, appropriate surgical methods can have certain effects.