Hie..
it happens after tooth extraction.. numbness usually takes 3-4 months to be normal.. but u need to do mouth opening exercises by placing 3-4 fingers, u must feel the stretch and try to keep it for 10sec likes that .. and continue after every 10-15 mins to reduce the stiffness.. and normalises the opening u used to have ..
Next Steps
Keep doing warm saline rinses 2-3 times atleast a day for a month
Health Tips
For ulcer..use dolo gel-CT,,