I stopped radiation 4 weeks ago and just noticed today I have a bald spot on the back of my head. It's about 3" in diameter and is just above the hairline. I called the radiation nurse (I did not have Chemo) and she said it was where the radiation exited and it would grow back. I'm surprised I hadn't noticed this before because I did notice my back was quite red during treatment due to the radiation exiting.

I've read on other posts that if the hair loss is due to radiation, it won't grow back. Has anyone experienced regrowth? If so, how long did it take.