Bones rattling when moving, may be long-term lack of exercise, normal joint popping and other physiological reasons, may also be caused by osteoarthritis, osteoporosis and other pathological factors. 1. Physiological reasons: there are many gases in the normal joint fluid, when the joints move, the pressure in the joint cavity increases, the gases are squeezed out and ruptured, and there may be popping, which is normal joint popping; in addition, long-term lack of exercise will make the soft tissues around the joints loose, and after the re-activity, the joints will have impact or friction, and the above symptoms may also appear. 2. Pathological factors: when osteoarthritis occurs in the body due to various reasons, it will cause pathological changes such as osteophytes inside the joints and narrowing of the joint space, and when the joints are active, the bones will be impacted, and rattling may also occur; when osteoporosis occurs, it can lead to a decrease in the body’s blood calcium content, and the bones will become brittle, and when a brittle bone fracture occurs, the symptoms mentioned above may also occur. There may also be other reasons for the bones to rattle, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.