Ischemic osteonecrosis of the femoral head in children is an osteochondrosis that often occurs in children, starting with degeneration or necrosis, followed by regeneration or recalcification, and eventually necrosis of the femoral head will occur. Its incidence is high and it occurs in boys aged 3 to 12 years. Modern medicine believes that the blood supply to the femoral head has its own anatomical characteristics at different times. The blood supply to the femoral head in children mainly comes from the extracapsular arterial ring formed by the branches of the medial and lateral femoral arteries, and from this arterial ring, the subsynovial artery supplies blood to the femoral head, and the artery of the round ligament of the femoral head completely disappears at this period, due to the imperfection of the extracapsular arterial ring and the narrow caliber of the subsynovial artery, at this time, if the main blood vessel is damaged, the The occurrence of congenital hip dislocation after reset, acute or chronic injury, will cause insufficient blood flow to the femoral head, resulting in ischemic necrosis. However, the small nourishing arteries and veins supplying the femoral head travel on the surface of the femoral neck and are only covered by a layer of synovial membrane, so when the pressure in the joint cavity rises to a certain level, it will inevitably lead to these Therefore, when the pressure inside the joint cavity rises to a certain level, it will inevitably lead to the obstruction of blood supply to the femoral head and neck, and the vein will be blocked. According to Chinese medicine, this disease is mostly caused by the immature development of the epiphysis due to the lack of kidney qi, while children like to move, run and jump excessively, which causes repeated strain on the hip joint, resulting in local qi and blood stasis and obstruction of the meridians. According to the above analysis of blood flow to the hip, etiology and Chinese medicine in children, we can find that more causes can cause ischemic necrosis of the femoral head in children.