hello thre, thanks for consulting at hcm.i am oral diagnostician i think u r having oral submucous fibrosis,just check inside ur mouth u might feel the bands in the back region,,, it is due to pan chewing habit,,it is an irrevrsible condition which comes under potentially malignant disorders, so kindly stop the habit of pan chwing ,, then u can start antioxidants tablets, and there r other options like intralesional inj with steroids, r surgry and flap reconstruction or latest is stem cell therapy which is very expensive and done at selected places only... other wise cost may be for intrlsnal inject and surgery,,range from 5- 10 thousand rupees. plz consult an oral maxillofacial surgeon.. hope it helps