I wonder if they are not using to strong a dose and that is causing pain.........then I worry it can actually cause another type cancer. I don't know if I would want radiation, so I sure hope they find no cancer when they go in there.
I had a lumpectomy last December on both breasts. A second one was done on the left breast (which had cancer stage 1) followed by 37 treatments of radiation, 1 week booster. I too have pain in my rib cage on the left side. I spoke with my raodiaoligist/oncologist who said that it does take 12 -18 months for your body to get back to normal. REMEMBER IT HAS BEEN TROUGH ALOT. Give it time. Everyday something even alittle will feel better.
The bone pains you are experiencing may be secondary to the medicine you are taking (Arimidex), or it may be a post surgery or post radiation effect. Patients do complain of increased cutaneous sensitivity to pain on the site where surgery or radiation was done, that even a light touch would elicit intense pain.
You should discuss your symptoms with your oncologist. For the mean time, you can take any over-the-counter pain relievers to relieve you of the discomfort.