Can an Injection That Dissolves Filler Remove the Hyaluronic Acid in My Skin Too? Facts and Misconceptions About Hyaluronidase

Hyaluronidase is an enzyme that breaks hyaluronic acid (HA) into smaller fragments, increasing its diffusion through tissue. It can therefore act not only on injected HA filler but also on HA in normal connective tissue. However, there is no basis for interpreting this to mean that the skin will “melt away permanently.” [1]

Consumers should first distinguish between two situations. Elective dissolution for gradual correction when they are unhappy with the shape is entirely different from suspected vascular occlusion accompanied by skin-color changes, severe pain, or visual symptoms—in terms of both urgency and goals. [3]

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What exactly does hyaluronidase break down?

The FDA’s HYLENEX label explains that hyaluronidase hydrolyzes HA in the ground substance of connective tissue. In human skin experiments, an enzyme-lowered barrier recovered less by 24 hours depending on the dose, but had recovered at all treated sites by 48 hours. These data are not a study that guarantees a particular cosmetic outcome. [1]

An important distinction is that not all fillers contain the same type of HA. The amount of enzyme required and the speed of the response may vary depending on the degree of cross-linking, particle structure, injection depth, and time since injection. This is why it is difficult to compare numbers such as “a certain number of units will be enough” without knowing the product name. [2]

If a product is FDA-approved, is filler removal an official indication?

No. The indications on the FDA label are to facilitate the absorption and dispersion of other injectable drugs, subcutaneous fluid administration, and subcutaneous urography. Dissolving cosmetic HA filler is not an indication listed on the label. The use of an approved drug by a physician for another purpose must be distinguished from saying that the FDA has approved its effectiveness for that purpose as well. [1]

How precisely can facial filler be dissolved?

The evidence is thinner than one might expect. A 2022 scoping review analyzed five randomized trials involving 53 people that met its criteria, out of 395 papers. The test sites were the arms and back, not the face, and the studies examined dose response for simple HA nodules. There was no clinical-trial evidence addressing facial overcorrection, inflammatory nodules, or ischemia. [2]

This does not mean the enzyme does not work. It means that, although an effect has been observed, comparative trials supporting the precision of “removing only the filler by exactly a certain percentage” in the face are lacking. [2]

Why might the face feel “sunken”?

When the volume supported by the filler is lost, the underlying skeleton and soft tissue become visible again. If the area feels more hollow than it did before the procedure, reduced swelling, shadows created by light, and natural aging during the period the filler was present should also be considered. Conversely, pain, pallor, or a netlike discoloration should not be dismissed as merely a change in appearance.

How are an allergic reaction and an emergency different?

The FDA label lists hypersensitivity to hyaluronidase or formulation ingredients as a contraindication and advises discontinuation if sensitization occurs. Aesthetic-medicine safety guidelines also address formulation differences and allergic reactions separately. [1][3]

Blurred or reduced vision, sudden severe pain, or skin that turns white or grayish blue is not something to wait out until a scheduled appointment. Filler-related vascular occlusion can cause tissue damage, so the treatment provider and emergency-care system should be contacted immediately. [3]

What should be compared before treatment?

First, confirm whether the original filler is HA. Other materials, such as calcium hydroxylapatite or poly-L-lactic acid, are not dissolved by hyaluronidase. Second, clarify whether the goal is emergency dissolution or correction of the shape. Third, ask about a plan for gradual correction with small amounts and reassessment, documentation of the product used and dose administered, and the system for managing adverse reactions.

Q. Is it better to dissolve everything completely in one session?

Not necessarily for elective correction of the shape. The desired volume may disappear along with the unwanted volume, so starting with a small area and checking the response may be more appropriate. When vascular occlusion is suspected, however, restoring tissue perfusion takes priority over fine cosmetic adjustments.

Q. Can I get filler again immediately after it has been dissolved?

Time is needed for swelling and inflammation to settle and for the actual volume to be assessed. In particular, if there was an inflammatory nodule or possible infection, filler should not be reinjected until the cause has been resolved.

DERME VERDICT

Hyaluronidase is a useful structural drug, but it is not a cosmetic eraser. The key is to first distinguish what is being dissolved, why it is being dissolved, and how urgent the situation is, then choose a medical provider that keeps product records and conducts staged reassessments.