Hello... Welcome to practo..
The swelling in face can be due to many reasons including dental caries.
First take antibiotics for three days, twice a day..
Take an orthopantamogram or xray and verify the condition of the teeth.
Then consult me for further details..
Health Tips
do salt and warm water gargling.
soft brushing left side.
avoid chewing left side.
avoid hot and spicy food..
avoid touching the swelling area, intraorally with the tongue.
use warm packs three times a day and each five minutes.