It takes 4~6 weeks after the femoral neck fracture surgery before you can lift your leg straight. After the fracture of the femoral neck, the patient’s hip joint activity will be obviously limited, and when lifting the leg straight, the femoral neck will be subjected to greater force, which may cause re-injury of the fracture site. Femoral neck fracture needs at least 4~6 weeks of recovery time to reach the stage of bone scab formation, muscle and ligament tissues can gradually return to normal function, then you can slowly carry out the functional exercise of lifting the leg straight, but also pay attention to avoid excessive force. Femoral neck fracture need to recover for a period of time to carry out straight leg lifting and other functional exercises, you can first exercise the ankle and knee joints, if in the recovery process of the neck of the femur parts of the swelling, pain and other manifestations, you need to consult a doctor in a timely manner.