Dissolving filler

What is hyaluronidase?

What is hyaluronidase?

Hyaluronidase is a prescription-only medicine containing an enzyme that breaks down hyaluronic acid, often shortened to HA.

We use it to break down HA dermal filler. It does not dissolve non-hyaluronic acid materials such as poly-L-lactic acid, or PLLA (Sculptra), calcium hydroxylapatite, or CaHA (Radiesse), or permanent fillers.

Understanding what was injected is an important part of the assessment.

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Hyaluronidase in an emergency

Hyaluronidase in an emergency

When HA filler compromises the blood supply to skin, prompt hyaluronidase treatment aims to restore circulation and limit tissue damage.

This is an urgent complication. Dr MJ accepts both patient self-referrals and practitioner referrals for vascular adverse events.

Treatment may involve several injections across the affected area and repeated assessment or further doses.

If you believe you have an urgent complication, please do not delay getting in touch and call the practice immediately on 0151 236 5166.

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Guided and unguided dissolving

Both approaches have a place. The right choice depends on the problem, the area being treated and the size and position of the filler deposits.

Dissolving without ultrasound guidance (unguided)

Dr MJ uses examination, the feel of the tissues and her knowledge of the anatomy to decide where to inject. This can be appropriate when filler is spread through an area in many small deposits, rather than collected in one clearly identifiable lump.

In the lips, for example, Dr MJ often starts without ultrasound guidance because the deposits can be very small and widely distributed. If discrete deposits remain afterwards and can be identified on ultrasound, these may then be treated under guidance. An unguided injection is still a carefully planned treatment and has good success rates in appropriately selected cases.

Ultrasound-guided dissolving

During guided treatment, Dr MJ watches the needle and an identifiable filler deposit on the live ultrasound image as she injects. This helps her deliver hyaluronidase into the deposit. It can be useful for a particular lump, a deeper collection or filler remaining after previous dissolving.

Ultrasound cannot show every piece of filler. Very small deposits may be too small to see, and not seeing them does not mean they are absent. Guidance helps us target what is visible; it does not guarantee complete removal or a particular cosmetic result.

How much filler should be dissolved?

How much filler should be dissolved?

The aim may be to reduce a troublesome deposit, remove excess volume or dissolve more widely. Treatment can be staged, with reassessment before deciding whether to do more.

The plan is based on the benefit we expect, rather than an assumption that every trace of filler must go.

Dr MJ has treated thousands of complications and has extensive experience of what happens after dissolving. She takes a pragmatic approach: sometimes she will advise leaving filler alone because removing it could make the appearance worse. Consultation and examination are essential to that decision. Ultrasound is used when it adds useful information.

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What are the risks?

What are the risks?

Injections can cause bruising, swelling, soreness, bleeding and temporary redness. Swelling can be pronounced around the eyes or when several areas are treated. Hyaluronidase is an irritant and can cause local reactions. There is also a risk of injury to nearby structures from the injection. In very rare cases, severe allergic reactions such as anaphylaxis can occur.

Hyaluronidase also temporarily reduces the naturally occurring HA in the tissues around the injection. Natural HA turns over rapidly and is expected to replenish promptly, typically within 24 to 48 hours. This is an estimate, not a guarantee of when swelling will settle or your appearance will stabilise. It is not known to cause permanent depletion of your natural HA. This temporary effect is different from losing the volume provided by injected filler, which can leave a lasting change in appearance. Hyaluronidase has a good safety profile when used appropriately. Dr MJ will review your medical history and discuss the risks of the procedure with you.

Dissolving can be incomplete or uneven, and more than one appointment may be needed. Symptoms may persist if filler is only part of the problem. A lump, redness or swelling may require other management, particularly if infection or inflammation is involved. Further dissolving should follow reassessment.

What happens after treatment?

What happens after treatment?

You will receive aftercare advice and a plan for review. Early swelling can make the result difficult to judge, so decisions about further treatment are made after reassessment.

If a remaining concern is caused by tissue changes or anatomy rather than removable filler, repeated dissolving may not help.

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