Oral infections can happen after oral surgery.
I had an infection after a root canal, I had a lot of swelling and pain.
I called the dentist and he thought I was making a big thing out of nothing, said just take the antibiotics.
Finally I insisted on an appointment and he nearly pooped himself when he saw how bad the swelling was.
He referred me to an oral surgeon who said, let's go to the hospital right now.
Oral surgeon said my airway was in jeopardy if the bacterial infection accelerated.
Had drain inserted that day and was hospitalized with IV antibiotics for 2 or 3 days.
This was in the US and luckily I had good insurance.
Probably close to worst case scenario but even still...