DEAR DR. ROACH: I have a badly torn rotator cuff on my left shoulder, so that arm is basically a constant problem. In January 2017, my physician suggested that I would benefit from the pneumonia vaccine and that it would take two applications, one year apart, to complete. I agreed to have the vaccine, which was administered into my upper left arm. Ever since then, I have had pain in the muscle area and at times do not have use of that arm. I have talked with the nurse, the physician assistant and also with my orthopedic doctor about this problem.