Scott, I didn't really have "mouth sores", just a very sensitive tongue and throat. I can tell you that I still have a very sensitive tongue and throat and I am 11 months after rad/chemo treatment. I just tend to ignore it as much as possible and drink things that don't hurt as much. However, we are all different and others on the board have had a more difficult time of it. And some have had it easier. So hang in there, there is light at the end of the tunnel.