Thanks for the input.
Well, there are a number of reasons for you to have this sudden swelling of the cheek.
Right now, you can take Motrin or Aleve (non-steroid anti-inflammatory drug---NSAID) to reduce pain and swelling.
Ice packs application to the affected area will also help, and see how you respond to these measures.
If the swelling/pain does not improve, persists, or gets worse, go to your doctor and have this examined physically to determine the exact underlying cause for this, which will direct a specific and targetted management plan; such as antibiotics for infection.
I hope this clarifies and answers your question.
Kindest Regards XXXXX XXXXX luck.
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