Hi Donnajean:
I have been finished with my radiation treatments going on 6 months now and I still get chilled or cold easier than I use to. I also had treatments to the head/neck area. The oncologists also has talked about what damage could happen to the thyroid. He has also told me that this is a possible side effect from radiation like I had mine done. I had 20 treatments once a day and the second 20 were completed at a rate of 2 a day. It does get better though.