Hello.
Any history of habits like chewing?
Kindly attach pic of lower lip.
History with chewing causes:-
Limited mouth opening.
Burning sensation
Could be signs of oral sub mucous fibrosis.
Next Steps
Advised to visit nearby oral and maxillofacial surgeon for physical examination evaluation and treatment plan
Health Tips
Kindly share the history
If history of chewing:-
Cessation of habits
Refrain from hot and spicy food
Intake of healthy diet
Initate treatment.