When I grew in my wisdom teeth, first I grew in the uppers, then I grew in the lowers some time later. When the lowers grew in, I wasn't used to have a full set of teeth back there, and kept biting my cheek over and over again, and it would get more swollen from the bites, so i'd bite it more, so it would get more swollen. It was self perpetuating and absolutely horrible!! It didn't get better, actually, until I DID get a tonsil infection and couldn't handle solid food for about a week, so I wasn't chewing anything.
Moufs are so sensitive!