Understanding Dermal Filler Dissolving with Hyaluronidase

Part of our complete guide to Dermal Fillers.

What is hyaluronidase and how does it work?

Hyaluronidase is a naturally occurring enzyme in the human body that breaks down hyaluronic acid (HA). In aesthetic medicine, it is an essential safety tool and corrective agent, so practitioners to dissolve hyaluronic acid-based dermal fillers when complications arise or results are unsatisfactory. Understanding this enzyme is crucial for anyone considering or who has undergone HA filler treatments.

Practitioners are fully trained in the use of hyaluronidase and carry it as standard in every treatment room. This reflects Our focus on patient safety and best practice in line with JCCP and Save Face guidelines.

Why might dermal fillers need dissolving?

There are several clinical scenarios where dissolving filler becomes necessary or advisable:

• Vascular occlusionthe most serious complication, where filler inadvertently compresses or enters a blood vessel, potentially compromising blood supply to tissues
• Overfilling or asymmetrytoo much product placed or uneven distribution
• Migrationfiller moving from the original injection site over time
• Tyndall effecta bluish discolouration caused by superficially placed filler
• Granuloma formationinflammatory nodules around the filler material
• Patient dissatisfactionthe patient simply wishes to return to their natural appearance
• Delayed-onset nodulesfirm lumps appearing weeks or months after treatment

Emergency dissolution for vascular occlusion

Vascular occlusion is a medical emergency in aesthetic practice. When filler compresses or enters a blood vessel, it can cause tissue ischaemia and, in rare cases, blindness if the retinal artery is affected. Immediate administration of hyaluronidase is the first-line treatment, and every reputable aesthetic clinic should have protocols and stock available for this eventuality.

Signs of vascular occlusion include severe pain disproportionate to the procedure, blanching (whitening) of the skin, dusky or mottled discolouration, and delayed capillary refill. Prompt recognition and treatment are essential to prevent permanent tissue damage.

The dissolution procedure: What to expect

When you attend for filler dissolution, the procedure typically follows these steps:

1. AssessmentYour practitioner will examine the area, take photographs, and discuss your concerns and expectations
2. Allergy testingSome practitioners perform a small skin prick test, though this remains debated in the literature. Those with bee or wasp venom allergies may be at higher risk of reaction
3. PreparationThe area is cleansed and may be numbed with topical anaesthetic
4. InjectionHyaluronidase is injected directly into the area where filler is present, using multiple small injection points
5. MassageThe area is gently massaged to distribute the enzyme throughout the filler
6. ReviewYou will typically be asked to return in 2-4 weeks to assess results and determine whether further dissolution is needed

Dosage and technique considerations

The amount of hyaluronidase required depends on several factors: the volume of filler present, the type and cross-linking density of the HA product, and the anatomical location. Heavily cross-linked fillers such as Juvéderm Voluma may require higher doses than lighter products like Restylane Skinboosters. Your practitioner will calculate an appropriate starting dose based on their clinical assessment.

What results can you expect?

Hyaluronidase begins working almost immediately. Most patients notice significant reduction in filler volume within 24-48 hours, with the full effect visible at around two weeks. Key points to understand:

• The enzyme dissolves both injected HA filler and your bodys own naturally occurring hyaluronic acid in the treated area
• Your natural HA will regenerate over the following days to weeks
• Multiple sessions may be required for large volumes or heavily cross-linked fillers
• The area may appear slightly deflated temporarily as natural HA recovers
• Swelling, redness, and tenderness at the injection site are common and usually resolve within 48 hours

Safety profile and side effects

Hyaluronidase has been used in medicine for decades, in aesthetics and to aid the absorption of subcutaneous fluids and local anaesthetics. Its safety profile is well established. Common side effects include:

• Localised swelling and redness (very common, self-limiting)
• Bruising at injection sites
• Tenderness or mild pain
• Temporary asymmetry as the enzyme takes effect

Rare but more serious risks include allergic reactions (urticaria, angioedema, anaphylaxis in extremely rare cases) and over-dissolution resulting in volume loss beyond what was intended.

Can you have filler again after dissolution?

Yes. Most practitioners recommend waiting a minimum of two to four weeks after dissolution before re-injecting filler. This allows the hyaluronidase to be fully metabolised and your natural tissue hyaluronic acid to regenerate. Rushing to re-inject too soon may result in the new filler being partially dissolved by residual enzyme activity.

Choosing a practitioner for filler dissolution

Filler dissolution requires the same level of expertise as filler injection, arguably more, as it often involves managing complications or correcting previous work. When selecting a practitioner, look for:

• Registration with a professional body such as the JCCP, NMC, GMC, or GDC
• Specific training in hyaluronidase use and complication management
• Listing on the Save Face accredited register
• Evidence of ongoing CPD in aesthetics
• A thorough consultation process including informed consent

“The availability and competent use of hyaluronidase is a non-negotiable safety standard in any clinic offering hyaluronic acid filler treatments. It is not optional, it is essential.”, Aesthetic Complications Expert Group (ACEG)

Frequently asked questions

Summary

Hyaluronidase is one of the most important safety tools in aesthetic medicine. Whether used as an emergency intervention for vascular compromise or as an elective correction for unsatisfactory results, it provides a reliable and well-established method for dissolving hyaluronic acid fillers. We believe that informed patients make better decisions, and understanding the reversibility of HA fillers is an important part of that informed consent process.