Hyaluronidase can break down hyaluronic-acid filler, but “dissolving filler” is not a universal reset. The correct decision depends on what product was injected, where it is located, why the area looks abnormal and whether the concern is volume, edema, inflammation, migration or another diagnosis.
What hyaluronidase can dissolve
Hyaluronidase is an enzyme that degrades hyaluronic acid. It may be used electively for unwanted hyaluronic-acid filler or urgently when vascular compromise is suspected. The response varies according to the product, concentration, cross-linking, location, elapsed time and how accurately the enzyme reaches the material.
It does not dissolve PMMA, silicone, calcium hydroxyapatite, poly-L-lactic acid, other biostimulators or transferred fat. Treating an unknown product as if it were hyaluronic acid can delay the correct diagnosis.
Why history alone may be incomplete
Patients may not remember the product name, date, volume or exact injection plane—especially after multiple treatments. Medical records and implant labels should be requested when available. Examination can identify patterns, but appearance alone cannot always determine the material.
Dermatologic ultrasound may help locate deposits, distinguish some types of material, identify edema or inflammatory change and guide targeted treatment. It has limitations and should be interpreted together with history and examination. Read more about ultrasound before hyaluronidase.
Observe, investigate or dissolve?
| Clinical situation | Possible next step | Important limitation |
|---|---|---|
| No symptoms and acceptable contour | Observation may be appropriate | The presence of old filler alone does not mandate treatment |
| Uncertain product or plane | Records, examination and selected ultrasound | Imaging does not answer every question |
| Hyaluronic-acid filler contributing to edema or distortion | Targeted hyaluronidase may be considered | More than one treatment may be needed |
| Suspected vascular occlusion | Immediate emergency assessment and protocol | Do not wait for routine imaging or an elective appointment |
| Permanent filler, biostimulator or fat | Diagnosis-specific management | Hyaluronidase will not remove these materials |
Risks and limitations of hyaluronidase
Possible effects include pain, bruising, swelling, temporary contour change and allergic reaction. Severe hypersensitivity is uncommon but possible. The final appearance cannot be judged while the area is swollen, and an apparent volume loss may reveal the original anatomy that had been camouflaged by filler.
There is no reliable promise that one session will remove all filler or that the area will return exactly to its pre-injection state. Repeated injections should be based on reassessment rather than a fixed number of sessions.
Filler around the eyelids and malar region
The lower eyelid and malar region are particularly sensitive to excess volume and fluid retention. Puffiness may reflect filler, but it can also represent orbital fat, malar edema, festoons, inflammation, lymphatic factors or midface descent. Hyaluronidase does not treat all of these causes.
Before Hybrid Blepharoplasty or video-assisted midface surgery, Dr. June may recommend mapping and selective dissolution when filler obscures anatomy or contributes to edema. Not every patient needs all filler removed. See old under-eye filler before blepharoplasty.
Planning facial surgery after injectables
Fillers, threads, biostimulators, PMMA, silicone and previous device treatments can alter tissue planes or create inflammation. The surgical plan may need to be modified, staged or postponed. Learn more about injectables, ultrasound and facelift planning.
For international patients, investigation should occur early enough to avoid arriving in Brazil with unresolved swelling or an uncertain product history. Concierge support can coordinate appointments, but diagnosis and treatment remain medical decisions.
The objective is diagnosis, not automatic reversal
Hyaluronidase is valuable when hyaluronic-acid filler is part of the problem. It should not be used as a routine “clean slate” before every procedure or as a substitute for determining what is actually present.
