My wife, Female age 35 5 8 , 240#, type 2 diabetic, never had children, has a sudden onset of soreness in her left arm. Any time she tries to move it, she has severe pain that feels like a broken arm. She first noticed it 48 hrs ago. There s no bruising, and she didn t bump or bang it on anything. She s had no abnormal activity for a long time. When she drops her arm to the side, she has sharp pain in the shoulder area about 4 below the neckline. What could this be?