Hyaluronic acid (HA) fillers have become one of the most popular non‑surgical aesthetic treatments – temples, nasolabial folds, lips, chin… the results are immediate. But if too much is injected, placed in the wrong layer, or the wrong product is used, the results can backfire: facial puffiness, stiff expressions, localised lumps, or even serious complications like vascular occlusion. What’s even more concerning is that while HA does metabolise, it takes 6‑18 months to fully clear. If you’re unsatisfied with the results or have developed complications, do you really have to just “wait it out”? Hyaluronidase (dissolving enzyme injection) exists precisely to solve this problem. It can within 24‑72 hours precisely break down HA molecules into water and carbon dioxide, making excess or improperly placed filler disappear quickly. What exactly is hyaluronidase? Can a single session dissolve everything? Will it dissolve your skin’s natural HA? Are there side effects? This article will comprehensively walk you through the principles, suitable candidates, treatment options and prices, procedure experience, duration of results, and potential risks – giving you all the key information in one place so you can make a rational choice.
The core ingredient in a hyaluronidase injection is hyaluronidase – a natural enzyme that specifically breaks down hyaluronic acid. To understand how it works, you first need to know how HA exists in the body. HA is a long‑chain polysaccharide composed of alternating D‑glucuronic acid and N‑acetylglucosamine molecules. These long chains act like “sponges” that lock in large amounts of water, creating volume. Hyaluronidase works by cleaving the β‑1,4 glycosidic bonds in the HA molecular backbone, “cutting” the long chains into shorter fragments, which then degrade into oligosaccharides and ultimately hydrolyse into glucose and carbon dioxide. Once the HA chains are cut, their water‑holding capacity is lost, and the volume they once supported rapidly collapses. Is this reversible? Chemically speaking, once the enzymatic reaction is complete, the cut chains cannot reconnect on their own – but the body metabolises and eliminates the degradation products within 24‑48 hours, making the results relatively rapid and thorough.
Onset timeline of hyaluronidase: Onset – begins working within 15‑30 minutes after injection; Peak effect – most noticeable at 2‑6 hours; Stabilisation – results are stable by 24‑72 hours. However, if the HA contains cross‑linking agents (BDDE), the metabolic breakdown of those cross‑linked scaffolds may take longer.
Hyaluronidase is mainly suitable for the following groups:
However, not everyone is suitable for hyaluronidase. Conditions that are absolute contraindications or require careful evaluation include: known allergy to hyaluronidase or any of its excipients; pregnancy and breastfeeding (safety not well established); active infection (e.g., herpes, folliculitis) or skin breakage at the injection site; use of anticoagulant medications (may increase bleeding risk). Additionally, those allergic to bee venom should be especially cautious – some hyaluronidase products contain bee‑derived components.
In Korea, hyaluronidase injections are primarily priced by treatment area and the number of units required. Reference prices for different doses and sites are as follows:
| Option | Best for | Features | Reference price (KRW) |
|---|---|---|---|
| Small‑volume localised dissolution (e.g., 1 vial) | Minor overfilling in lips, tear troughs, nose, etc. | Precise local dissolution, low volume, cost‑effective | ~120,000 – 250,000 |
| Mid‑face / full‑face moderate volume | Overfilled cheeks, forehead, cheeks, etc. | Typically requires 2‑5 vials depending on the area | ~200,000 – 700,000 |
| Emergency vascular occlusion dissolution | Skin whitening, severe pain, or other occlusion symptoms | Emergency treatment, often requires high‑dose rapid dissolution | Emergency visit required – varies by case |
Note: Prices above are reference ranges for the Korean market. The cost of hyaluronidase depends primarily on the number of units used, which is related to the HA brand, degree of cross‑linking, and amount injected. In some cases, multiple sessions may be needed – please refer to your in‑person consultation.
Your choice should be made after discussing the injection site, amount, and degree of dissatisfaction with a qualified doctor. Generally, hyaluronidase costs less than the HA filler itself.
Pre‑procedure preparation: On your first visit, the doctor conducts a detailed consultation, assessing the injection site, HA brand, degree of cross‑linking, and the area to be dissolved. Some clinics perform a skin test first to confirm there is no allergy to hyaluronidase.
During the procedure: The doctor uses an ultra‑fine needle to precisely inject hyaluronidase into the target HA filler area. The injection dose depends on the amount of HA and its degree of cross‑linking – the higher the cross‑linking, the more enzyme is required. The procedure takes about 10‑30 minutes. You may feel mild stinging during injection, but anaesthesia is generally not required.
Immediately after: Within 15‑30 minutes, you can observe the dissolving effect – the previously full area gradually softens and flattens. Some people may experience mild local redness and swelling, typically subsiding within a few hours. Hyaluronidase requires no downtime – you can resume normal activities immediately after treatment.
The effects of hyaluronidase unfold in three phases: Immediate effect (15‑30 minutes after injection) – the enzyme begins breaking down HA molecules, and the treated area starts to soften and reduce in volume.
Significant effect (2‑6 hours after injection) – most of the HA is degraded, the filler effect visibly subsides, and contours return to a natural state.
Stabilised effect (24‑72 hours after injection) – the enzymatic reaction is complete, the HA is fully degraded, and the results are stable. The effect of hyaluronidase is permanent in the sense that it breaks down the injected HA – it does not inhibit future HA production. If you wish to refill later, new HA can be reinjected. It’s important to note that hyaluronidase only works on hyaluronic acid‑based fillers. However, residual cross‑linking agents (BDDE) may take longer to metabolise and are not affected by hyaluronidase.
Q: Is hyaluronidase painful?
A: You may feel mild stinging and swelling during injection, but it is generally well tolerated. Most people find it less painful than HA filler injection, and numbing cream is usually not required.
Q: Are there side effects or long‑term risks?
A: Hyaluronidase is relatively safe when performed properly, but the following risks should be noted:Allergic reactions– hyaluronidase may cause allergy (especially in those allergic to bee venom);Over‑dissolution– if the dose or range is not properly controlled, it may dissolve too much HA, leading to local depressions or volume loss;Uneven dissolution– may cause surface irregularities;Infection– as with any injection. Choosing a reputable clinic and a qualified doctor significantly reduces these risks.
Q: Will hyaluronidase dissolve my skin’s natural HA?
A: Theoretically, hyaluronidase can break down both cross‑linked and natural HA. However, the natural HA content in the skin is extremely low and is in a constant state of turnover – it is typically resynthesised by the body within24‑48 hours. As long as the dose is properly controlled, it will not cause long‑term structural damage to the skin.
Q: How long after hyaluronidase can I get HA filler again?
A: It is generally recommended to wait until the hyaluronidase has been fully metabolised before refilling – about2‑4 weeks. The exact timing depends on the dissolution results and individual recovery.
Q: How much does hyaluronidase cost in Korea?
A: In Korea, small‑volume localised dissolution costs approximately120,000‑250,000 KRW; moderate‑volume full‑face dissolution costs approximately200,000‑700,000 KRW. The price depends primarily on the amount of HA to be dissolved. Please refer to your in‑person consultation.
💡 Key note: Hyaluronidase is the “undo” button for HA fillers – it can quickly correct unsatisfactory results or treat complications. However, it is a “correction tool” rather than a “routine maintenance treatment” – it should be used as needed under the guidance of a qualified doctor.
Potential side effects: Side effects of hyaluronidase are typically mild and transient, mainly including local redness, pain, and swelling – usually resolving within hours to 1 day. A small number of people may experience local depressions or unevenness, which may require touch‑up filler or time for the body to self‑adjust.
Post‑care essentials: Avoid rubbing the treatment area for 24 hours after treatment; avoid hot or cold compresses on the treated area; use sun protection to prevent pigmentation; if you experience severe pain, extensive redness, or fever, seek medical attention immediately.
To maximise results, be sure to: choose a licensed dermatology or aesthetic clinic that uses genuine hyaluronidase; fully disclose your allergy history to the doctor (especially bee venom allergies); be realistic about results – dissolution effects typically stabilise within 24‑72 hours – don’t panic over temporary swelling; do not treat hyaluronidase as a “routine procedure” – it is a corrective measure for unsatisfactory results or complications, not a regular treatment to “change your look on a whim.”
Medical disclaimer:
This article is for educational and informational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations. Aesthetic procedures involve individual variations – results and risks differ from person to person. Prices, treatment options, and other information mentioned are for reference only – please refer to actual consultations for current details.
All medical procedures carry potential risks (including but not limited to allergy, infection, over‑dissolution, local depression, unsatisfactory results, etc.). Before making any decision, please consult a qualified medical professional in person, who can assess your suitability based on your health status, constitution, and needs. The author and publisher assume no legal liability for any decisions made based on this content.
If you experience any discomfort or have concerns, please seek prompt advice from a licensed physician.