I have a (permanent) white patch on the right side of my tongue. Same side of my tongue that had the tumor & received the most radiation. Seen by all 3 of my team dr. My radiation dr. took a swab, it came back -clear. So now she calls it an "ulcer". It only bothers me if I have had to much of acid type foods. When it hurts me, I apply a perscription my dr. made for me: Lidocaine 2% Visc Solution. It is soothing. I use as needed during the day & at bedtime. I check my tongue patch weekly, it does not seem to get any bigger or smaller. Just another war wound!