Taking snuff for a prolonged period is not known to cause cancer but it may lead to a number of local infections. Also, such people have a number of vitamin deficiencies which may also lead to irregularities in the cheeks and gums. i would advise you to take an antibiotic and antifungal (Tab Ciprofloxacin
500mg twice daily +Tab Forcan 150mg twice daily) plus a multivitamin
(Tab B-Complex twice daily), all for 15 days. If your bumps dont improve by then,you should consult a surgeon.