I was diagnosed with breast cancer in December 2008. In 2009 I had surgery, chemo and radiation. In August 2009 I started Arimidex. I have quite a lot of bone pain and some hot flashes but the thing that got me out here on the WWW is that I am so often cold. I sit in my office with the space heater on when the thermostat says 72 degrees. At home the heat is turned up and I am in a sweatshirt with blankets over me. Could this be from the Arimidex? Is it possible that my thyroid was damaged by the radiation?