I have been dealing with this problem for over a year now. Had 6 months of physical therapy, and that didn't help. Had cortisone shots in both shoulders, and it only helped me left for a short amount of time before the pain started creeping back. I had an X-ray done on both shoulders, and nothing was found. I also had an Arthrogram done on my left shoulder, and they couldn't see anything. They tested my strength and range of motion and all of that was fine.
My left shoulder pops at 2 points: If I flex my arm, and then lift it straight above my head, my bicep pops into place fairly violently as my arm starts to become perpendicular to the ground. Then, if i continue to rotate my shoulder back without flexing (think of doing the windmill with your arms) my shoulder will pop right at the bone in the front of the shoulder. It doesn't hurt constantly, though it can easily be agitated. It hurts during certain exercises, such as a bench press. As the bar just about touches my chest, the shoulders feels like it is being stretched too hard. I've stopped exercising until I can get these straightened out.
The right shoulder can be felt at all times. It doesn't hurt always, but there is a constant discomfort. At first, it felt as though it was sinking down, but it also feels like it has moved forward as well. If I move it backward, I feel a pop in the lower part of my shoulder on my back as well as a tightness and a pop throughout the front.
I've felt the doctor's have pretty much been ignoring me, and it is becoming increasingly frustrating. Any idea what my problem could be in either shoulders?