Just wanted to share what I used to deal with the irritated flaky skin from the radiation. They didnt want me to use anything before my treatments, didnt want anything blocking the radiation rays, but one of the nurses suggested to me a product called Badger Balm, I know this stuff sounds weird, but it worked wonders for me and is a natural product, I would use it even before treatments. It is olive oil and some other natural things, but what it would do is soften up all that dead skin, and within like 2 or three good applications, all that horrible looking skin around my neck was gone.
You can find this product at Cracker Barrel restaurants of all places, but you may be able to get it online, I havent looked it up.
Hope this helps,