is a precancerous lesion which is occurred mainly due to the habit of smoking
The final diagnosis can be made only as per biopsy report.
I would suggest you to quit smoking.
Take plenty of fluids and nutritious rich diet.
VITAMIN -A,C,AND B12,supplements has to be administered.
Maintain oral hygiene
Rinse your mouth after every meals.
Please do visit a dentist
for further reference.
Hope this helps.