Rattling of bone and joint when moving may be a normal phenomenon, or it may be caused by meniscus rupture and joint degeneration. 1. Normal phenomenon: Bone joint is composed of joint cavity, joint capsule and articular cartilage, the joint capsule is surrounded by a large number of tendons, these tendons in the friction around the joints will be rattling, which is a normal phenomenon, without special treatment. 2. Meniscus rupture: When meniscus injury occurs, there will be joint rattling sound when the joint is moving, accompanied by pain, swelling and clinical symptoms of joint interlocking. 3. Degeneration of joints: with age, the patient’s joints will degenerate, the joint space will become narrower, and there may be osteophytes and calcification, etc., so the patient will have bone rattling during activities. It is recommended that when the patient has the symptom of bone and joint ringing when moving, go to the hospital in time to avoid delaying the condition and causing adverse consequences.