Adhesive Capsulitis (AKA sticky shoulder or frozen shoulder) is a very painful condition where you lose rang of motion for your arm. I’ve been to several doctors and the physicans don't know the cause of frozen shoulder!
They even have whole books on treating sticky shoulder, but nothing on the cause:
Well, let me clear up the cause of sticky shoulder! I have no doubt that my right arm Adhesive Capsulitis is a repetitive golf injury, just like tennis elbow . .