Sir this problem is due to chronic cheek bite by ur wisdom teeth... Permanent solution is extraction of ur lower wisdom tooth...
But u r not ready for it u may get ur upper n lower teeth grinded within limits... It will also give u some relief...
Next Steps
visit a dentist for needful
Health Tips
start applying kenacort gel 3 times a day for 3 days... will reduce some swelling.. also warm saline rinses 3-4 times a day...