For patients with clavicle bulge in the shoulder area, it can be seen in the following cases: 1. Trauma, especially after trauma caused by subluxation or dislocation of the acromioclavicular joint area, resulting in laxity of the acromioclavicular ligament, rostral clavicular ligament, and can not fix the clavicle well, which will cause the clavicle to bulge. 2. Acromioclavicular arthritis, which can lead to the acromioclavicular joint area to be stimulated by the aseptic inflammation, and the formation of a significant local Inflammatory edema will be formed locally, which will also lead to the bulging of the clavicle and obvious pressure pain when pressed, and the pain will be obviously aggravated when lifting the shoulder.