The collarbone forms the sternoclavicular joint with the sternum (breastbone) at one end and the acromioclavicular joint with the acromion (part of the ... 5% to 10% of all bone breaks.

The inner part of the bone, near the sternum (breastbone) is usually broken with direct force. When a clavicle fracture occurs, it is common to have pain and swelling at the site of the injury.