The femoral head is located in the hip joint, and the femoral head is the most recent end of the femur, in a hemispherical structure. Together with the acetabulum in the pelvis, it forms the hip joint, which is surrounded by ligaments and joint capsule to stabilize the hip joint. The hip joint is the connection joint between the human body trunk and lower limbs, the force is greater, and after the hip joint area suffered trauma, it is easy to cause femoral neck fracture. Fracture of the femoral neck will easily lead to the destruction of the blood flow of the femoral head and cause necrosis of the femoral head at a later stage. For long time alcoholics, or long time irregularly taking hormone people, also easy to lead to the femoral head part of the blood transportation obstacle, cause the femoral head necrosis, so that the hip joint part of the obvious pain.