My wife of 63 had rotatory cuff repair operation two years ago. Last week she woke up with intense pain in her shoulder and a pocket of what seemed like fluid in it on top of the shoulder. Not like a blister under the skin but a bit deeper. As it persisted the shoulder became more red and painful. Antibiotics don t help and a sonar showed fluid in the soft tissue above the joint but none in the joint or tendon. She has severe pain and fever an no one knows what to do. The shoulder is now severely inflamed and swollen and no pain killers help any more. I have resorted to administering Morfeen orally to help her cope with the pain and it helps, but the second course of antibiotics finishes tomorrow and has had no effect. She was also not bitten by something.