The most common clinical symptoms are limited internal rotation and abduction of the hip. The most common clinical symptoms are limited internal rotation and abduction of the hip. The affected side of the thigh has obvious shortening deformity and quadriceps atrophy, and the child may have unstable gait and limp. We used a combination of therapies to achieve satisfactory results and control the further development of the disease. Femoral head necrosis in children is a partial or total necrosis of the femoral epiphysis due to blood flow disorders in the femoral head, and it can occur in children aged 2 to 12 years old, and is more common in children aged 4 to 8 years old. Many children report pain in the knee, but the diagnosis is delayed because the doctor does not examine the hip. If not treated in time, it can cause hip dysfunction and deformity. The disease is mostly caused by long-term, repeated, minor trauma. The older the age of the disease, the more serious the condition and the worse the treatment effect. It brings great trouble to their study and life. We hope that everyone will pay attention to this disease and strive for early detection and treatment to maximize the recovery of joint function. Let every child have a sound body and mind and a perfect life.