Early symptoms of femoral head necrosis in females are pain in the groin after walking, excessive activity or exertion, climbing hills and stairs, and soreness around the hip joint in the early stage, which cannot be relieved after resting in the late stage, and severe pain. When lying in bed, the 4-word sign appears positive, one side of the foot to the opposite side of the knee when placed in a “4”, then the pain increases can not be completed, and at the same time when the pain worsens when the internal contraction. Early appearance of these symptoms, especially after rest can not be relieved, need to go to the regular hospital for examination, if the film does not clearly show the femoral head necrosis, but the symptoms are more obvious, need to check the magnetic resonance, is the diagnosis of early necrosis of the femoral head is a better means.