The purpose of femoral neck surgery is to provide early mobility. Internal fixation provides sufficient fixation strength for fracture stabilization and prevents osteoporosis and joint stiffness. Exercise can prevent many difficult problems such as venous thrombosis, limb swelling, decubitus ulcers, pneumonia, urinary tract infections, etc. However, there are principles of exercise and only non-weight-bearing activities are allowed until the fracture heals. Internal fixation with plates and screws alone cannot provide stability under weight-bearing conditions. 1. Is there a high rate of necrosis of the femoral head after femoral neck fracture? According to the survey, 33% of fractures heal after femoral neck fracture, 33% of head necrosis and 33% of bone discontinuity occur after healing. 2. Since the head necrosis and failure rate are high, why do we still perform internal fixation surgery? At present, percutaneous screw internal fixation is performed for femoral neck fracture, which is a minimally invasive surgery with short operation time. The purpose of the surgery is only to create a chance for the fracture to heal, and if the joint replacement is carried out too early, several joint revision surgeries are bound to be performed later; and for an elderly person over 65 years old, artificial joint replacement surgery is a better choice. 3.What exercises can I do after the internal fixation surgery? Before the fracture is healed after surgery, you can only do isometric muscle contraction exercises in the resting state of the joint and limb. You can turn over and lie on your side or in a semi-recumbent position with your hip and knee flexed.