Bones in your 30s rattle when you move. Consider physiological reasons such as friction of cartilage inside the joints, and pathological factors such as tenosynovitis and lesions inside the joints. 1. Physiological factors: generally small joints such as interphalangeal joints, activities within the joint cartilage friction with each other, squeezing the air inside the joint, resulting in sound. It is not accompanied by pain or activity disorder and does not require treatment. 2. Pathologic causes (1) Tenosynovitis: due to long-term contraction of tendons, cold and other factors lead to aseptic inflammation, tendon swelling and inflammation, through the narrow tendon sheath when the abnormal sound. (2) intra-articular diseases: ligament damage may also be caused by trauma, joint subluxation, meniscus injury and intra-articular free body, etc., due to intra-articular degeneration, meniscus tear, free body activity, etc., friction increases during activities, and rattling occurs in the joint. The performance is more than 30 years old, the bones move rattling. It is recommended to consult a physician for treatment under the guidance of a physician if there is a rattling of bones when moving.