How hyaluronidase works
Hyaluronidase is an enzyme that cleaves the bonds holding hyaluronic acid together. Injected into an area of filler, it breaks that filler into fragments small enough for normal tissue clearance.
The treatment itself takes about ten minutes. It is injected the same way filler is, with a fine needle and typically topical numbing. Onset begins within hours; the bulk of the effect is complete at 24–48 hours, and the final state is clear at about two weeks.
It does not work on every filler. Sculptra (poly-L-lactic acid), Radiesse (calcium hydroxylapatite), and permanent products such as silicone are not affected by hyaluronidase. This is a significant reason to know exactly what product was placed in your face.
Why people dissolve
The reasons split roughly into three groups.
Aesthetic. Too much volume, migration above the lip border, lumps that did not resolve, or asymmetry that did not correct with a touch-up. Migration is the most common one we see — filler that has drifted upward over multiple rounds, creating a shelf above the vermillion border.
Medical. Vascular compromise is a rare but urgent complication where filler compresses or occludes a blood vessel. Hyaluronidase is the emergency treatment and is given immediately. Any practice injecting HA filler should keep it stocked.
Reset. Some patients have accumulated filler over years across multiple injectors and want to return to baseline and rebuild deliberately. Dissolving everything and starting from a clean assessment is a legitimate and increasingly common plan.
What dissolving does not do
Two honest limitations.
It is not surgical precision. Hyaluronidase diffuses. If you have 1cc in your lips and dislike a small area on one side, dissolving that area will likely reduce filler nearby as well. Injectors can be conservative and stage the treatment across visits, but nobody can remove exactly one lump and nothing else.
It can affect your own hyaluronic acid. Your tissue contains native HA. Hyaluronidase does not distinguish. The effect is temporary — your body regenerates it over weeks — but it is why lips often look smaller than your original baseline for a stretch after dissolving. That is expected, and it resolves.
The timeline
- Day 0: Treatment, roughly ten minutes. Swelling and sometimes bruising afterward, similar to a filler appointment.
- Day 1–2: Most of the dissolution is visible. Swelling from the injection itself can mask the result.
- Day 3–7: Swelling settles. This is when the actual change becomes readable.
- Week 2: Final state. Lips may look slightly deflated relative to your natural baseline.
- Week 2+: Safe to place new filler if you are rebuilding.
- Week 4–8: Native hyaluronic acid regenerates and baseline volume returns.
Do not judge the outcome before day 7, and do not book a re-treatment before the two-week mark.
Cost and finding someone to do it
Dissolving is generally priced per session rather than per unit of enzyme, and it is typically less than a syringe of filler. Some practices dissolve their own work at no charge; many will dissolve another injector's work as a standard paid treatment.
Two things matter more than price:
- They keep hyaluronidase on hand. Any injector placing HA filler should. If a practice does not stock it, that is a meaningful safety signal about the practice as a whole.
- They will assess before they dissolve. Not every complaint needs dissolving. Migration sometimes needs dissolving; underfilled-looking lips sometimes need more product, not less. An injector who dissolves on request without examining you is not doing the job.
If you are unsure what product you have or where it was placed, bring whatever records you have. It changes the plan.