After joint replacement for femoral head necrosis, it is not exactly the same as normal people. In the early postoperative period, the patient cannot squat deeply, the lower limbs cannot be crossed, and it is not recommended to cross the legs, otherwise there is a risk of dislocation of the artificial joint. With the recovery of the disease and the strengthening of functional exercise, the hip joint is no longer prone to dislocation. Generally, after 2 months, the basic life of patients is the same as normal people, and they can live, work and play appropriate sports normally, but it is not recommended to carry out long-term weight-bearing work or a lot of heavy labor, otherwise the joint will be excessively worn out and the service life of the artificial joint will be shortened accordingly.