Rolnda, I also had rad to the tongue, max dose, you could see stripes where the radiation had hit. However I didn't have the long recovery time your husband is experiencing.

For him to get better then worse sounds like possibly infection again, he seems prone to infections from his history. Definately I'd see another doc with maybe more experience, posibly culture the blisters and see what's going on.

As others have said, we all heal differently, I tend to heal fairly quickly I guess do don't go by me for a length of healing time standard.

Bob