Necrosis of the femoral head can be initially self-examined through the symptoms of necrosis of the femoral head, but the diagnosis of necrosis of the femoral head needs to be based on imaging under the guidance of a doctor. Necrosis of the femoral head is characterized by severe pain in the leg, which increases when the hip joint is abducted to a certain degree. Necrosis of the femoral head can also cause claudication, which is mainly due to the collapse of the femoral head after necrosis of the femoral head, resulting in unequal length of the leg. Clinically, hip replacement can be used for femoral head necrosis with a better prognosis. Self-detection is subjective and less accurate, which may lead to too light judgment and delay the condition. x-ray and CT examination are the common examination means for femoral head necrosis, and magnetic resonance imaging (MRI) is the gold standard for the diagnosis of femoral head necrosis. Therefore, if the above symptoms occur, it is recommended to consult a doctor in time for a clear diagnosis and targeted treatment.