Juveni Confort Dermal Filler - Lots of Swelling

I had Juveni Confort (Perlane equivalent?) in 2 sessions, 2 weeks afer Fractional CO2 laser. #1 was Nasolabial, marionette lines, tear troughs & lips. #2 (a week later) was chin & cheekbones.

A couple of days after the 2nd session, began significant lip swelling (huge), chin, and marionette lines, plus needle injection point, along with on and off tearing. I just finished 2 weeks of prednisone, and things are nearly settled down. The final result looks great, but what the heck happened?

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