Hi Nelie,
At first I was in alot of pain from these sores. I couldn't talk for more then 30 minutes or so then it became to painful. I went and had one of the teeth filed a bit and that helped, but I'm thinking of having the tooth removed to take the problem away. Eventually, your tongue will kind of toughen up where it's being rubbed, almost like a callous. Don't let the area spook you if it changes color and texture. Show it to your doctor of course but the area will change in looks and feel. My tongue is still sore if I talk alot so I try to pace myself. I am also guilty of eating candy alot which may contribute to my mouth being sore, not sure on that one.
I found rinsing my mouth with salt water a few times a day worked wonders and also Biotene mouthwash is awesome. I keep some in my purse and use it nonstop, not so much for dry mouth as it relieves the soreness in my mouth.
Hope this helps,
Minnie