Thanks to everyone for your support and advice. He finished Radiation last week and is having many of the issues described on the boards. The inside of his mouth has blisters, he coughs all day from throat or swallowing issues. I think it is (at least partially) the mucus issue but he won't discuss it in any detail. He hasn't lost his voice completely but his voice is very soft and hard to hear. He hardly moves his mouth/jaw to talk. Weight is a touchy issue for me to ask about but I think he is still losing weight.

You might have noticed that we have very little communication. I do try to work in advice that I have picked up from here but he does not want to hear or listen to anything or tell me anything. He wants me and everyone else to leave him alone and that's how it has been for the last few weeks.