Bone ringing can be caused by a variety of reasons, including physiological ringing, osteoarthritis, meniscus loss, free bodies in the joints and other factors. 1. Physiological rattling: Physiological rattling of bones is common in joints, joint fluid lubricates the joints, but the joint fluid contains gas, so when the joints move, the gas is released quickly, and the rattling sound is physiological rattling, which is not accompanied by pain. 2. Osteoarthritis: Osteoarthritis is formed after degenerative changes occur in the joints of the knee, hip, ankle, etc. The cartilage on the joint surfaces will be destroyed, and then the joints will be unstable, the ligaments will be lax, and the muscles will not be able to bind the joints, and the old ringing sound of the bones may occur. 3. Meniscus injury: It is due to the meniscus tearing easily to run between the femur and tibia, the meniscus displacement during the joint activities leads to the direct contact between the two bones, which results in the old ringing of the bones. 4. Joint free body: free body in the joint, this situation, will cause the free body in the joint and other bone collision, resulting in rattling. There are many other reasons for the rattling of bones, such as bone tumors, synovitis, fractures, etc. It is recommended to consult a doctor in time to clarify the cause of the disease before treatment.