My right collar bone has always been a bit more pronounced than my left, sticking out further:-(. Lately it has appeared to get bigger and it hurts. The whole area around it is tender, under my jaw, my neck, under my ear and my shoulder, just below the collar bone . I can do a full rotation of my shoulder and it does not hurt. Just the area in front and on top from my neck to the shoulder. My neck is not stiff , I can turn it and tilt left and right without discomfort. It hurts when I touch it where the two bones almost touch . I wish I could send you pictures. It is hard to explain:-(