Femoral head necrosis will reach an advanced stage 3-5 years later. 3-5 years means that the patient’s femoral head necrosis is not detected and treated early, and the patient does not take the crutches under the guidance of the doctor, does not adhere to the medication under the guidance of the doctor, and does not do interventional or minimally invasive treatment early, and is allowed to develop. 3-5 years later, the patient’s femoral head will collapse, bone redundancy will form, the joint space will become narrower, and the joint function will be lost. The joint space will narrow and the joint function will be lost. The patient’s hip flexion and extension, extension and rotation functions will be limited, and the patient’s daily walking, running, jumping, squatting and relieving hands will be affected, and the patient will enter the advanced stage. Therefore, early diagnosis, early intervention and early treatment of femoral head necrosis are necessary to avoid the development of advanced stages.