I smashed my shoulder into the floor playing football a few years back, I'm assuming it dislocated, the doctor only told me I'd torn ligaments, I'm guessing that was as a result of it popping out.

A few years later with no physio or surgery, when I windmill both arms, the damaged one doesn't rotate as freely or the same as the other.

When bench pressing, doing push ups, I still get a burning sensation right in the shoulder joint.

This is one of the things that has worried me about taking up boxing (that and poor fitness) I was hoping that as the muscles around it grew it may fix itself. Now I'm not so sure!