<s>[INST] i had leukoplakia , which is more or less cured now, it took nearly 9 mths to heal. but i have a very small whitish bump on my gum just behind the lower left molar. my lesions were on both my inner cheeks. i used to drink occassionally, smoke and chew tobacco heavily. i have left them all completely for nearly 9 mths, though i drink whiskey/vodka/beer very rarely,say once in a month. what could be the possibilities of my lesions to be recurrent? why am i having that bumb? [/INST] Hello, the most common causes of recurrence of leukoplakia is repeated trauma in the region, either by tobacco, brushes or from sharp edges of tooth/traumatic occlusion.its good your lesion is curing now. Since 9 months have been passed and some white lesion still exists. I will advise you to consult an oral medicine specialist and get your occlusion checked and remove if any irregularities are noted there. Even if it doesn't regress then you can also go for excisional biopsy of the lesion which will remove the lesion completely.you should stop all adverse habits. Antioxidents will help you in treating the lesion. Get national and healthy diet full of raw fruits and veggies rich in antioxidants.take care. </s>