Why does swelling/Voluma overfill come back a week after Hyaluronidase injection?

got several hyaluronidase rounds for voluma. everytime i get a little swollen the first two days, then it all goes away and i look better for around three days, then the voluma seems to come back . all of it almost like the first time i injected it. i called allergan that verified lot number. i dont understand why voluma comes back after a week, 8 days all the time.

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