Round sore, surrounded by white ring, on tongue.

I have had a round, sore on my tongue for several months. It started when I was eating a lot of salads. I used tweezers to try to get it out, and it is like separated from other tissue of the tongue, but the white ring part pulled off, like gristle. I use peroxide to rinse, and keep my teeth brushed. What can this be? How do I treat it? Acid or friction makes it worse.
Bonnie Carr


**edited by moderator**