THE ART OF MELTING FILLER Demonstrating the reversibility of filler and why it’s done! Hyaluronic acid is reversed with hyaluronidase, an enzyme that catalyses its breakdown. The reasons for reversing fillers range from incorrectly placed filler, too much filler, allergies to filler, or emergency situations where there is compression or blockage of a blood vessel as a result of injection. In non emergency situations there is as much of a skill in reversing filler as there is in using filler. It