I am having problems from my shoulder from an injury that happened 32 years ago. I had an AC clavicle separation in the 3rd degree 32 years ago and after so many years, I have been getting dull pain and neck pain. During the day I can handle the pain, but at night, it is a different story. The pain wakes me up and I have a hard time sleeping. Back when I separated my clavicle, I did not do that much therapy and was told that it would get better on its own. Can someone please tell me, what exactly would cause this pain and why would it happen after so many years later? Is there a medical condition that deteriorates my clavicle or surrounding area to produce this pain and what is it called. Thank you in advance.