Hole in back of cheek! Help :(

[Imseagraves]

It’s been about 3 days, I’m becoming concerned.. does this look like a canker sore or possibly something more serious? It’s very painful!!! No fever or other symptoms.
has anyone had something similar?

 

[honestdoc]

That is called apthous stomatitis. It's an autoimmune response will go away in about 7 to 10 days. If you get frequent painful sores, have your dentist prescribe you Kenalog in Orabase. It is most effective if you apply it on the first day you notice.