Thanks for all the good suggestions. I found the Rincinol worked really well for me. And then I got some Gelclair and found it's the same ingredients as the Rincinol. I high recommend this to anyone who's suffering from mouth sores. My "blisters" finally got smaller and are now gone after about 10 days. As many people have said, you just have to wait these things out...but the Rincinol/Gelclair realy did help a lot.

my mother knows a man who's having extensive radiation to his face after having half his face removed from skin cancer.
He's been taking double doses of co enzyme Q10 and also double doses of grape seed extract (tablets) and he reports no blisters and can still eat comfortably. Worth a try.
My partner starts radiation next week so I've got him on it all already. It boosts the immune system apparently.

David, Where are you in upstate NY? I had mouth blisters and used gel-clair which helped some. For the ones on my lips, I used carafate, which looked horrible but dried them out and made them feel better.

Nelie