Take heart! In my case, looking back at my notes, four months after the end of my radiation treatment I noted that my blisters were lessening. At five months I noted that I still got a sore throat from certain acidic foods but made no mention of the blisters.

I can say that 9 months after the end of my radiation treatment I had forgotten all about the clear "water" blisters. I'm sure that's hard to believe.....frankly I find it hard to believe that I had forgotten about them. Now that I've been reminded, I remember being very concerned indeed.

Mine were very similar to the description by dwnky; I had big ones below the inside of my lower lip opposite my lower canines, and little ones on the insides of my cheeks and across the back of my mouth and uvula. I believe these are "secondary" salivary glands trying to put saliva into your mouth in response to certain foods, but the skin on the inside of your mouth is damaged from the radiation and still healing.

It will get better. Maybe try avoiding any foods that are salty and/or acidic. I couldn't handle even tomatoes. By now I can eat almost anything. I still don't enjoy spicy food much (which is sad, since I used to be a heat freak......Tabasco on my pizza, hot mexican salsas, peri peri sauce), and my dry mouth, while improving, is still a challenge with bready foods. I still carry water with my most of the time, but I don't normally need it unless I'm exerting myself or eating certain foods.

I do find that the xylitol mints, such as Theramints, are a great help when out and about, and they only take up a little room in my pocket. Of course, one should avoid normal sugar if you have dry mouth, but the xylitol is supposed to not encourage the cavity-forming bacteria, according to my dentists.