I had bad mouth pain, the kind that was only dulled by prescription pain meds, for a few months after radiation ended. In fact, I still have a very sensitive mouth 2 years later and may always have it this way according to my ENT (but don't worry-most people are fine 2 years out)

And I also had lots of mucous also for months. In my case, though, I think the mucous seemed worse because I wasn't swallowing most of it--which was actually the first clue that I had a more serious swallowing problem overlooked by everyone at first. So I would recommend if there still seems to be a lot of mucous a couple of months out, and you haven't had a swallowing test, that you get one.

Nelie