It seems you have developed a precancerous condition called submucous fibrosis;due to continuous irritation of mucosa by the carcinogenic substances present in your panmasala.its best to avoid its use and visit dentist who will prescribe some medicaments and help maintain proper oral hygiene. REMEMBER PREVENTION IS BETTER THAN NO CURE.
Next Steps
discontinue use of pan masala and visit a dental doctor at an earliest
Health Tips
use certain minted chewing gum in place of pan masala