Cheek swelling

Amber • Mommy to a beautiful baby boy.

over the past two nights I have noticed that my 3 month old's left cheek gets puffy during the night when hes asleep but goes down not long after him being awake. This doesnt seem to cause him any sort of pain. Has anyone experienced this.

***Note: I am calling his doctors office in less than two hours I just want to know if anyone has experienced this and knows about it.