Could be candidal leukoplakia (chronic hyper-plastic candidosis) Or another candidal variant, leukoplakia. CHC, if left untreated, it can turn to carcinoma in a small minority. See an ENT for proper diagnosis, one prefably one who has cancer experience. You may need fluconozole, if so, an anti-fungal. Candidiases thrives on sugar, alcohol, yeast, , processed foods, so avoiding them may help. Alternately, if could be a combination of a bacterial, fungal or viral infection too, and may want to do a culture, and other exams, proper meds to treat each. If you smoke, chew tobacco, that should be stopped, and by doing that reduces the leukoplakia, risk of cancer. Good luck
http://cro.sagepub.com/content/14/4/253.full