Right shoulder has been bothering me for about 5 months. Thought it was bursitis but no. Saw the doctor today and he thinks it a AC separation. Tried doing a little research and it sounds like it happens from blunt trauma to the shoulder. ie; a fall, impact sports ect. I am pretty sure bench pressing was to blame. I still dont know if that is what it is, i have an xray next week and a MRI to follow. Has anyone ever heard of this or know anybody that has had this. Doctor pressed on the shoulder bone (lump on top of the shoulder) and it felt like someone hammered a spike into the bone.