Today my doctor told me that I had pinched one of the shoulder muscles attached to my rotator cuff and that the muscle is swollen. I’m supposed to stay away from the computer because holding my arm horizontally in ways that allow gravity to pull on it will just make my injured muscle swell more. More swelling = more pinching = more swelling. I’m supposed to ice the shoulder 5 times each day.
You ask what happened. When I woke up Monday morning, a sharp pain occurred right when I first moved my left arm as part of the movement of getting out of bed.