Low clavicle and high clavicle can be caused by congenital developmental abnormality, as well as dislocation of acromioclavicular joint, clavicle fracture, scoliosis and other diseases. 1. Congenital developmental abnormality: due to congenital skeletal dysplasia, one side of the clavicle will be shorter than the other, thus causing the symptoms of one side of the clavicle being low and the other side being high. 2. Dislocation of acromioclavicular joint: after the acromioclavicular joint is subjected to violence, the soft tissues around the joint will be damaged and dislocation of acromioclavicular joint will be caused, resulting in the upward protrusion of the lateral end of the clavicle, which leads to the phenomenon that one side of the clavicle is high and the other side is low. 3. Clavicle fracture: when the clavicle is hit or collided by the external force from the front and above, it will cause the clavicle fracture and make the clavicle on both sides asymmetrical. 4. Scoliosis: due to bone degeneration caused by poor bone development, the spine bends to the high side, while the opposite side of the clavicle becomes low accordingly, and the greater the angle of the scoliosis, the greater the difference in the height of the clavicle between the two sides. In order to clarify the cause of clavicle height on one side and clavicle height on the other side, it is recommended to go to the hospital in time for professional and standardized treatment.