The sound of bones when moving may be due to the following reasons: 1. The sound of cartilage friction in the joints; 2. The sound of bones may be caused by the imbalance between the bone development and the development of the surrounding ligaments and joint capsule when the adolescent is in the development stage; 3. For example, common arthritis or meniscus injury, or due to the synovial membrane, cartilage, ligaments, and tendon tissue lesions around the joint, can trigger the patient to appear the bone ringing. If there is no pain or discomfort when moving the bones, there is no need for treatment.