Popping sensations in your collarbone (clavicle) are fairly common. You may feel it when you reach certain directions or move your arm and shoulder. You may hear a "pop" or "click." Often, collarbone ...

Arises from the brachiocephalic trunk (the first branch to arise from the aorta) Travels posteriorly (behind) the sternoclavicular joint (the area where the clavicle [collarbone] and the sternum ...