Rattling of bone and joint may be caused by physiological reasons, or it may be caused by joint strain, bone and joint degeneration. 1. Physiological reasons: teenagers are in the growth period, the growth rate of bones and joints is not coordinated with the development of the surrounding ligaments and joint capsules, resulting in the tightening of the bone and joint parts, which will cause abnormal friction and sound when moving. 2. Joint strain: In the case of strain and cold, the ligaments and joint capsules around the joints will become adhesive and contracture, thus causing the joints to tighten up, and the sound will be heard during the activities. 3. Osteoarthritic degeneration: when middle-aged and old people have hyperplasia and degeneration in the joints, it will lead to excessive friction in the joints, and there will be rattling in the joints during activities. Bone joint ringing can also be seen in other reasons, if we exclude physiological factors, it is recommended to timely hospitalization, under the guidance of professional physicians, targeted treatment to avoid further development of the condition.