3 weeks after Juvederm Voluma will the puffiness/swelling disappear or will I have to dissolve the filler?

Hi and thank you for sharing your question
here! In some unusual cases, Voluma or other hyaluronic acid fillers may absorb
some additional fluids once injected, and this can cause some fluctuating
swelling throughout the day. If the condition has not been improved after at
least two weeks following the initial injection, I recommend to remove it
by injecting hyaluronidase (preferably the recombinant form, e.g. Hylenex). Hylenex
is not expected to have any long-term effects on your own tissue. I hope it
helps and good luck!

I suggest reversing the filler your body may have a swelling response to it.  Hyaluronidase will not hurt your normal skin.  Best, Dr. Eemr.