My rotator cuff, that is. Hooray! However, I do have tendonitis (a.k.a. bursitis) that has resulted in impingement, which explains why I can't lift my arm. The inflamed tendons are pushing on the bursa, which is the little fluid-filled sack that allows them to slide smoothly between the top of the arm bone and the bottom of the shoulder bone. Basically, everything just locks up.
So, physical therapy is prescribed to strengthen the muscles and take the pressure off the tendon. I got a referral to a physical therapist (three blocks from home) and have an appointment for the Wednesday after Thanksgiving.
I confess, I was almost looking forward to a quick surgery to fix this, so I could take some time off work. Instead, I'll be doing some not-so-fun exercising on my own time. But them's the breaks.