Thanks for asking the query,
I would like to tell you that leukoplakia is a precancerous condition
and needs to be cured immediately, laser surgery
can be an option.
I would suggest you to visit to an Dentist
and get the checkup done.
Take an OPG radiograph, Biopsy of the lesion will confirm the diagnosis.
If you are having smoking, alcohol consumption so have to quit it permanently.
Hope this helps out.