I have had pain behind my right breast for about three years. I have annual breast exams and mammograms that have not shown any issues with my breast. The pain is not constant. I don't feel it everyday or every week. When it does begin to surface its fairly painful. I feel it most when I take a deep breathe or when i move such as reaching or bending. When I palpate the area to find a sore spot i find nothing. Could this be in my rib cage? the spaces between my ribs or even lungs.