After hip replacement surgery, if the prosthesis loosens, it can produce clinical symptoms such as pain and restricted joint activities, as follows: First, pain: at the initial stage of loosening, there will be symptoms of hidden pain in the hip joint, the pain does not affect the patient’s normal life, and he can still walk with weight, as the condition worsens, the pain will be further obvious and will affect normal life, even when resting, the pain symptoms will still Even when resting, the pain symptoms still persist. Second, the joint movement is limited: when the loosening develops to a certain extent, there will be a gap between the bone cement and the bone, and the joint prosthesis will move significantly. Patients will have limited movement of the hip joint, especially the limitation of flexion and extension and rotation is more serious. Therefore, early diagnosis and treatment are necessary. Once the loosening of the hip joint replacement is confirmed, the hip joint should be refixed through revision surgery to restore the function of the hip joint.