Thanks for the query,
Probably you are suffering from leukoplakia
Other possibilities are oral LP and candida.
Please meet a dermatologist
for exact diagnosis.
A photograph would have helped in diagnosing.
The treatment will vary from oral pastes to Intra lesional injections
Let me know if you have any other doubt.
you can ask a direct question to me on this forum, following the below link.
Wishing you a good health.