The root of the thigh is called the hip joint, which is composed of the acetabulum and femoral head, as well as the ligaments of the joint capsule. Usually in the clinic, the highest incidence of hip joint area is still necrosis of the femoral head. If the patient has pain symptoms in the hip joint area, especially if he/she walks too much or gets cold, the pain will be more obvious. For such patients, in order to clarify the expiration of the femoral head necrosis, it is necessary to cooperate with the auxiliary examination. For example, MRI of the hip joint can detect early femoral head necrosis. Once found, need to actively carry out symptomatic treatment, such as the need for crutches to carry out activities on the ground, reduce weight-bearing, and with hyperbaric oxygen therapy, drilling decompression surgery treatment. Necrosis of the femoral head, which becomes more and more serious with time, collapses and seriously affects the normal function of the patient, it is necessary to actively carry out total hip replacement surgery.