The cause of femoral head necrosis in children is unknown, mostly in obese boys, and may be due to hormonal abnormalities. x-ray shows ischemic necrosis of the femoral head, with hypodensity and sometimes irregular flattening. The aim of treatment of femoral head necrosis in children is to get a round femoral head and a matching hip joint, which is less likely to have joint pain and other symptoms later. Therefore, the treatment of the disease is meritorious now and beneficial in the future.