I had hyaluronidase injected to remove juvederm but it hasn't worked?

A specific dosing is required to get rid of any HA filler. While I tend to be conservative with any hyaluronidase injection, excessive conservatism could mean not enough was injected to remove the filler. I would prefer to inject hyaluronidase more than once rather than over-inject at the beginning. Or, you simply don't have Juvederm in there and there's no way for hyaluronidase to work. Hyaluronidase begins working immediately and is done within 48 hours, so if everything isn't gone at that point, you may need another round of treatment. Or you need to determine if it really is Juvederm to begin with. "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."