The pain after two months of femoral head replacement may be caused by postoperative adhesion, prosthesis reaction, joint dislocation and so on. 1. Postoperative adhesion: after femoral head replacement surgery, due to the reason of the surgery itself, there may be oozing around the surgery and adhesion of soft tissues, during the postoperative activities, the soft tissues of the joints are stimulated by the pulling and pain symptoms may occur. 2. Prosthesis reaction: the current femoral head replacement generally uses ceramic or metal prosthesis, during the postoperative activities, the prosthesis may impact with the surrounding soft tissues or stimulate the cartilage membrane, which may also lead to pain symptoms. 3. Joint dislocation: After femoral head replacement surgery, if the rehabilitation training is not correct, the strength around the hip joint is not balanced, the position is wrong, etc., the hip joint may be dislocated, which affects the normal movement of the joint, and may lead to pain symptoms. If the pain symptoms are not relieved, or accompanied by other symptoms, you should go to the hospital in time to clarify the cause and give targeted treatment.