Hyaluronidase in NYC: What It Is, How It Works and What to Expect from Filler Dissolution
Hyaluronidase is the enzyme used in hyaluronic acid filler dissolution. Understanding how it works, what it can and cannot do, and how it should be used can help patients make informed decisions about filler correction.
As a board-certified dermatologist who performs ultrasound-guided filler dissolution at her Manhattan practice, Dr. Jane Yoo uses hyaluronidase with careful planning, imaging, and an understanding of the clinical context. The goal is to dissolve the intended hyaluronic acid filler as precisely as possible while minimizing unnecessary effect on surrounding tissue.
What Is Hyaluronidase?
Hyaluronidase is an enzyme that breaks down hyaluronic acid into smaller fragments. Hyaluronic acid exists naturally in the body, including in the skin, joints, and extracellular matrix. It is also the material used in many dermal fillers.
In medicine, hyaluronidase has been used for decades to help improve the spread of injected substances through tissue. In aesthetic medicine, it is used to dissolve hyaluronic acid dermal filler.
Several hyaluronidase preparations are available in the United States, including:
- Hylenex: Recombinant human hyaluronidase, commonly used in aesthetic medicine
- Vitrase: Ovine-derived hyaluronidase
- Amphadase: Bovine-derived hyaluronidase
At Jane Yoo MD, Dr. Yoo selects the appropriate preparation based on the clinical situation and the patient’s allergy history.
How Hyaluronidase Dissolves Filler
When hyaluronidase is injected into or near a hyaluronic acid filler deposit, it breaks down the bonds within the HA gel. This causes the filler to lose its structure and water-retaining ability. The filler becomes softer, disperses, and is then cleared by the body through normal metabolic and lymphatic pathways.
The process begins quickly after injection. Visible softening may begin within hours, and the clinical result usually becomes noticeable within 24 to 48 hours. The result continues to develop over 1 to 2 weeks as the treated filler and breakdown products clear.
An Important Limitation: Hyaluronidase Does Not Distinguish Filler from Native HA
One of the most important things to understand is that hyaluronidase does not know the difference between synthetic hyaluronic acid filler and the body’s own naturally occurring hyaluronic acid.
At the doses used for elective filler dissolution, the effect on native hyaluronic acid is usually mild and temporary. The body continuously makes its own hyaluronic acid, and native tissue hydration and volume typically recover over several weeks.
However, if too much hyaluronidase is injected broadly or into the wrong location, it can unnecessarily affect surrounding native tissue. This is one reason ultrasound guidance is valuable. By seeing where the filler is located, Dr. Yoo can place hyaluronidase directly into the filler deposit and use the lowest effective dose.
Hyaluronidase Dosing: Why Context Matters
Hyaluronidase dosing is not one-size-fits-all. The appropriate amount depends on the type of filler, the amount of filler present, the depth of the deposit, the treatment area, and whether the situation is elective or urgent.
Elective Aesthetic Dissolution
For routine aesthetic filler correction, Dr. Yoo typically uses a conservative and targeted approach. Lower doses may be used when the goal is to dissolve a specific filler deposit while minimizing unnecessary effect on nearby tissue.
Emergency Vascular Occlusion
Vascular occlusion is a medical emergency. In this situation, high-dose hyaluronidase may be required urgently to dissolve filler that is compromising blood flow.
Patients who experience warning signs such as blanching, mottled discoloration, severe pain, or vision changes after filler injection should seek immediate medical attention. Vision symptoms require emergency care.
What Hyaluronidase Cannot Do
Hyaluronidase is useful, but it has important limitations.
- It only dissolves hyaluronic acid filler.
- It does not dissolve Radiesse, Sculptra, Bellafill, fat grafts, or other non-HA materials.
- It does not treat infection, biofilm, granuloma, or vascular injury by itself.
- It does not remove scarring or fibrosis.
- It does not treat dark circles caused by pigmentation, vascularity, thin skin, or shadowing unrelated to filler.
Ultrasound can be helpful when the filler type is unknown because different materials can have different appearances on imaging.
Allergy and Safety Considerations
Allergic reactions to hyaluronidase are uncommon, but they can occur. Patients with a history of bee or wasp venom allergy may have a higher risk of cross-reactivity and should discuss this during consultation.
Dr. Yoo reviews each patient’s allergy history before treatment and selects the appropriate preparation accordingly. Skin testing may be considered when indicated.
Swelling, redness, tenderness, and bruising after injection are expected treatment effects and are not necessarily signs of allergy. These usually improve within several days.
Why Ultrasound-Guided Hyaluronidase Produces Better Outcomes
Ultrasound guidance helps Dr. Yoo see the filler’s exact location, depth, and extent before treatment. This is information that cannot be reliably determined by looking at or feeling the face alone.
With ultrasound, Dr. Yoo can:
- Confirm whether filler is present
- Identify the filler’s depth and distribution
- Assess whether filler has migrated
- Visualize nearby vessels
- Help distinguish HA filler from non-HA materials
- Place hyaluronidase more precisely into the intended target
This allows for more efficient, targeted treatment and may reduce the risk of incomplete dissolution or unnecessary treatment of surrounding tissue.
See: Why Dr. Yoo Uses Ultrasound for Every Filler Dissolution
Frequently Asked Questions About Hyaluronidase
Q: What is hyaluronidase?
A: Hyaluronidase is an enzyme that breaks down hyaluronic acid, including hyaluronic acid dermal filler, into smaller fragments that are cleared by the body.
Q: How long does hyaluronidase take to work?
A: Visible dissolution often begins within 24 to 48 hours. The full result is usually assessed at 1 to 2 weeks. Dense, layered, or longstanding filler may require more than one treatment.
Q: Will hyaluronidase dissolve my natural hyaluronic acid?
A: It can temporarily affect native hyaluronic acid to a minor degree, but the body replenishes its own hyaluronic acid over several weeks. Ultrasound-guided treatment helps limit enzyme placement to the filler target.
Q: Can I be allergic to hyaluronidase?
A: Allergic reactions are rare but possible. Patients with bee or wasp venom allergy may have a higher cross-reactivity risk. Dr. Yoo reviews allergy history during consultation and may consider skin testing when appropriate.
Q: Does hyaluronidase work on non-HA fillers?
A: No. Hyaluronidase only works on hyaluronic acid filler. Radiesse, Sculptra, Bellafill, and fat grafts are not dissolved by hyaluronidase. Ultrasound can help confirm the type and location of filler before treatment.
Book a Hyaluronidase Consultation in Manhattan
Dr. Jane Yoo offers hyaluronidase filler dissolution consultations at her Manhattan dermatology practice. All dissolution treatments include pre-treatment ultrasound mapping for precise, image-guided treatment planning.
Schedule a consultation with Dr. Jane Yoo in Manhattan to discuss whether ultrasound-guided hyaluronidase filler dissolution is right for you.