Dissolving Filler in the Face & Lips

Posted on [post_date] [post_comments] [post_edit]

Dissolving filler is the process of using an enzyme called hyaluronidase (commonly known as hyalase) to break down hyaluronic acid filler that’s already in the tissue. The result: the filler dissolves within 24 to 48 hours, and the treated area returns to its pre-filler state. It’s one of the major safety advantages of HA-based fillers — and one of the main reasons we don’t recommend permanent fillers, which can’t be reversed.

This is the comprehensive guide to dissolving filler: when it’s appropriate, how the process works, what it costs, what to expect, and the common scenarios where patients consider dissolution. For the broader filler service context, see our .

What hyalase is and how it works

Hyaluronidase (hyalase) is an enzyme that breaks down hyaluronic acid — the active ingredient in HA-based dermal fillers. It works by cleaving the cross-linked bonds that hold the HA gel together, converting the gel into individual HA molecules that the body then naturally absorbs over the following days.

The enzyme is naturally present in the human body. The hyalase used clinically is manufactured as a purified, sterilised solution that’s injected directly into the area where filler dissolution is . The effect is targeted — only the filler in the immediate injection area is affected, and only HA-based products are dissolved.

Critically: hyalase only works on HA filler. Non-HA fillers — including calcium hydroxylapatite (Radiesse), poly-L-lactic acid (Sculptra), PMMA (Bellafill), and silicone-based — cannot be dissolved with hyalase. These products either gradually break down over much longer periods (1-3 years for Radiesse and Sculptra) or are essentially permanent (PMMA, silicone). This is one of several reasons we don’t use permanent or semi-permanent fillers at Centre for Surgery. For more on this, see our guide on .

When dissolving filler is the right answer

Several scenarios commonly prompt dissolution:

Result you’re with. The most common reason — the filler hasn’t produced the look you wanted. Maybe the lips are too big, the cheeks look heavy, or the overall result isn’t what was discussed at consultation. Dissolving allows a reset before re-treatment with adjusted technique.

Filler migration. Filler that has drifted from where it was placed, common with lip filler — see our detailed guide on . filler typically requires hyalase to correct because the product won’t move back into position on its own.

Overfilling over time. Patients who’ve had multiple rounds of top-up treatment over years often more filler than they realise. The effect can produce a heavy, "done" appearance that they didn’t intend. A reset with hyalase, followed by more conservative re-treatment, often restores natural appearance.

Lumps or asymmetry. Filler that hasn’t integrated smoothly — visible lumps, uneven distribution, asymmetric placement. Hyalase placed at the problem area can dissolve the affected filler without disturbing the rest.

Vascular emergency. The most urgent reason. If filler enters or a blood vessel — causing skin colour changes, severe pain, or (rarely) visual disturbance — immediate hyalase reversal is required to restore blood flow. This is a medical emergency and Centre for Surgery keeps hyalase on-site for immediate use if needed.

Pre-surgical preparation. Some procedures benefit from dissolving existing filler beforehand — most commonly facelift surgery in patients with significant accumulated HydraBack (Back Facial) [https://randoxhealth.com/] filler. See our guide on for the detailed discussion.

Change of preference. Patients sometimes simply decide they no longer want features. Tastes change, life circumstances change, or the social that the original treatment has shifted. returns the area to its natural state.

Allergic reaction or biofilm. Rare but real — some develop late-onset reactions to filler, sometimes from a biofilm (bacterial colonisation around the product). Dissolution typically resolves these reactions.

How the dissolving process works

Pre-treatment. A thorough consultation establishes what filler was placed, when, and where. If treatment was performed elsewhere, bring if available — though hyalase works regardless of which HA brand was originally placed.

test. carries a small risk of allergic reaction (well under 1% of patients). A patch test on the forearm 30 minutes before treatment confirms tolerance. For patients with known to bee or wasp stings (the enzyme has cross-reactivity), particular caution is warranted.

The injection.

What happens next. The filler softens within hours and dissolves over 24 to 48 hours. The treated area may initially look swollen as the enzyme works, then gradually returns to baseline as the dissolved HA is absorbed.

Follow-up. A review at 2-4 weeks assesses the result and determines whether dissolution are needed. Some patients — particularly those with substantial accumulated filler — benefit from a second session 2-4 weeks after the first.

How many sessions are needed

For most patients, a single session is . However, several factors can increase the number of sessions required:

Multiple rounds of filler over years can create denser, more integrated filler that needs more enzyme to fully dissolve.

Different filler types in the same area — some HA products are more cross-linked (more resistant to breakdown) than others. Resilient products may need higher hyalase doses.

Biofilm formation can shield filler from enzyme action, requiring dissolution sessions sometimes combined with antibiotics.

Unclear filler history — when the patient doesn’t know what was originally placed, treatment may proceed cautiously across sessions to ensure adequate dissolution without over-treating.

Most patients are dissolved within 1-2 sessions. Persistent residual filler beyond that is uncommon.

Does it hurt?

The injection itself is brief and tolerable. The very fine needle used produces minimal discomfort — similar to or less than the original filler treatment. Patients commonly report:

Topical anaesthetic can be applied for particularly anxious patients but isn’t necessary for most. The procedure is significantly less uncomfortable than most people expect.

What to expect afterwards

Immediately: mild swelling and possible small bruising at injection sites. Some redness for a few hours.

First 24 hours: the filler begins visibly softening and . The treated area may look swollen as the enzyme works.

24-48 hours: filler dissolution substantially complete. The treated area gradually returns toward its pre-filler state.

1-2 weeks: any residual swelling resolves. Final result visible at the 2-week mark.

Restrictions:

For more on the broader filler aftercare framework, see our and .

The "reset and rebuild" approach

For patients who want to restart their filler journey with better technique, the standard approach at Centre for Surgery is:

Stage 1: full dissolution of existing filler with hyalase.

Stage 2: recovery period of 2-4 weeks to allow the tissue to settle and any residual to fully .

Stage 3: honest reassessment of the patient’s natural anatomy without filler influence. Often patients discover their underlying anatomy needs less correction than they thought.

Stage 4: conservative re-treatment with appropriate volume and technique, if appropriate. Sometimes patients choose to remain filler-free at this point.

Stage 5: long-term maintenance plan with modest volumes at appropriate intervals, with periodic full dissolution every months to prevent accumulation.

This approach prevents the cycle of accumulating filler that produces the "done" appearance many want to escape.

Risks and considerations

Common (mild and self-limiting):

Less common:

Rare:

A thorough consultation discusses your individual risk profile based on filler history, skin type, and overall health.

What you can’t dissolve

Hyalase is specific to hyaluronic acid. It does not work on:

Patients with non-HA filler that they want face significantly more limited options. For some, the only practical answer is patience while the product naturally degrades; for others, removal of nodules or affected tissue may be considered. This is why we recommend HA-based products for all elective filler treatment — the reversibility is a fundamental safety feature.

Cost

At Centre for Surgery, filler dissolving treatment is priced per session — typically:

For patients filler placed elsewhere, no consultation fee is charged for the dissolution consultation. , including 0% APR, are available.

Common questions

No — dissolving returns the lips to their natural pre-filler state. Some feel their lips look "thin" or "deflated" after dissolving because they’ve been accustomed to filled appearance for months or years. Within 4-8 weeks, the lips look like the patient’s natural lips again. For more, see our guide on .

breaks down HA — both the filler and any local natural HA in the immediate injection area. The natural HA regenerates within days. There’s no permanent damage to the lip, cheek, or other treated tissue.

Minimum 2 weeks, ideally 4 weeks. The longer wait allows full tissue assessment and proper planning of conservative re-treatment.

Yes — hyalase works on HA filler of how long it’s been in place. Older filler may need slightly higher doses but the still works effectively.

This is common, particularly when treatment was performed elsewhere. Dissolution can still proceed — hyalase works on all HA brands. If non-HA filler was placed, the hyalase won’t dissolve it, which itself confirms the product type.

No specific treatment — just standard aftercare (gentle handling, no heat, no exercise for 24 hours). Most patients find the recovery substantially easier than the original filler treatment.

Yes — patients sometimes opt for full-face of accumulated filler from multiple areas. This may require 2-3 sessions over 4-8 weeks to achieve dissolution, depending on the volume and locations involved.

Vascular occlusion (filler blocking a blood vessel) requires immediate hyalase — within hours, ideally within minutes for best outcome. Centre for Surgery keeps hyalase on-site for emergency use. If you’ve had filler treatment elsewhere and develop concerning symptoms (skin colour changes, severe pain, visual disturbance), seek immediate attention — at our clinic, by phone on , or via A&E if outside clinic hours.

For minor adjustments, sometimes additional filler placed strategically in adjacent areas can rebalance the result without needing to dissolve. For more substantial changes, dissolution is usually the most reliable path. The honest answer comes from consultation rather than online assessment.

Centre for Surgery · CQC-regulated · GMC specialist-registered surgeons · · · ·

Filed Under:

Share this post

Primary Sidebar

I agree to receive marketing communications ()

I agree to receive marketing communications ()

Centre for Surgery is a CQC-regulated hospital on London’s Baker Street, delivering plastic and cosmetic through GMC-registered specialist surgeons. Our expertise spans facial procedures including and , , for men, and body procedures such as and . Patient safety, excellence and results sit at the heart of everything we do.

Centre for is a CQC-regulated private hospital on London’s iconic , plastic and cosmetic surgery led by GMC-registered consultant surgeons.

Marylebone

London

W1U 6RN

Mon – Sat, 9am – 6pm

Saturday consultations available