The lateral aspect of the clavicle is connected to the acromion, which forms the acromioclavicular joint with the acromion, and when the lateral aspect is protruding, a subluxation of the acromioclavicular joint is considered. If there is a history of obvious trauma, then this diagnosis should be very clear. Even so, it is important to go to the hospital and get an orthopantomogram of the clavicle to see if there is a subluxation of the acromioclavicular joint. The other side of the clavicle is connected to the sternum, against the midline, if there is a bulge at this end, consider whether there is a subluxation of the sternoclavicular joint, also go to the hospital to take an X-ray, the purpose of X-ray is also a differential diagnosis, that is, the clavicle and the acromion or the sternum whether the bone quality of the problem, such as tumors, tuberculosis and other diseases, need to do a differential diagnosis.