The reason for burning sensation is due to the trauma caused to your superficial soft mucosal layer In your mouth .
Since your tissues have now lost elasticity your mouth opening is also restricted .
There are certain steroidal therapies and topical agents to cure it .
Certain exercises too are recommended for gradually increasing your mouth opening .
Health Tips
Plz consult your doc to look out for any malignancy or any other pathology . Do not opt for any over the counter pills or ointments by yourself , they may harm you more .