BC. If you cannot lift your arm to the side you could have what’s called “frozen shoulder.” I had it twice years ago. Once in each arm. Takes a month or two to soften but you have to keep forcing movement. Look it up.Bob - Can you tell us about the pain? I have something wrong in my shoulder. X-ray shows no bone damage or arthritis. My arm can and does go numb. I can lift my arm straight to the front or rear but can't really lift it straight out to the side without severe pain. Pinched nerve?