Swelling post fillers
By "in the smile area" I assume that you mean into the nasal labial folds.... It is common to have swelling in the cheeks if you were injected in the NLF lines. Remember that swelling moves and swelling is the most common "complication" from fillers.
"This answer has been solicited without seeing this patient and
cannot be held as true medical advice, but only opinion. Seek in-person
treatment with a trained medical professional for appropriate care."
Injection to Smile Area with Swelling
It is normal to have swelling after injections, but not typical for filler itself to migrate. Without pictures it is hard to tell is your result is typical or not. Please post photos for us to help. Thanks! Dr. Emer.