I have not noticed yet my one side collar bone is popped up mirror I am noticing it from month No swelling no pain only click sound on shoulder when up hand you can't listen sound only feel if wants to hear Worrying about it what's the problem behind it Not any another issues I am fearing that's it's serious illness . . (One thing I give you on mind once I visited a tailor who measures my shoulder for future reasons and say your one should is down from other)