I had surgery 12-31-13 for a torn rotator cuff and torn tendons from a fall. After physical therapy every thing seemed fine except I had no strength in arm. After another MRI it showed that I still had a torn tendon. After surgery two weeks ago, having a block this time, I am experiencing a burning sensation in my hand. It is very sensitive to the touch. What caused this and how long will this last. I also have more pain in my shoulder this time.