If you chewing tobacco along with pan masala and betel nut (supaari) than chances of oral submucous fibrosis . The initial symptoms of this- burning sensation, problem in cheek blowing, restricted mouth opening difficulty in swallowing. It is a premalignant conditions. If mouth opening more than 4cm it is OK and cure with medications, if 3-4cm than intralesional injection with medications, if less than 3cm surgical intervention is required.
But you eat only tobacco than suspected of any malignancy.
Next Steps
go to oral and maxillofacial surgeon for proper diagnosis and treatment
Health Tips
please stop all habits.