Under-eye filler dissolving in Singapore:
puffiness, lumps and blue tint

Why people have under-eye filler dissolved

The lower eyelid is the least forgiving place in the face for filler. The skin is very thin, there is little fat between it and the muscle, and the area drains fluid slowly. Filler that would be invisible in the cheek can show here, and a gel that draws in water can turn a hollow into a bag. These are the concerns patients bring most often when they ask to have under-eye filler dissolved.

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How common is this? In a published series of 1,452 tear trough treatments in 583 patients, swelling occurred in 10%, contour irregularity in 4.6% and a bluish tint in 3.3%, and larger volumes raised the risk of swelling (Wilde 2023). Most problems after hyaluronic acid filler are mild and related to volume and technique (Signorini 2016). Hyaluronic acid placed too close to the surface can show as discoloration, the Tyndall effect, and a low dose of hyaluronidase into the superficial gel is among the published options (Hirsch 2006; Kroumpouzos and Treacy 2024).

Problems can also appear late. A systematic review of delayed complications after tear trough filler found swelling to be the most common, followed by lumps, migration and discoloration, appearing on average about 17 months after the injection (Trinh 2022).

Is it filler, eye bags or fluid?

Not every bulge under the eye after filler is filler. Dissolving only helps if hyaluronic acid is the cause, so the first job is telling these apart.

Clues that it is filler

• It appeared, or got worse, after treatment.
• It has an edge you can feel, or sits as a ridge or bead.
• It has a bluish tint.

Clues that it is eye bags

• The bulge was there before any filler.
• It becomes more obvious when you look upwards, which is typical of the fat that sits behind the eyelid.

Clues that it is fluid

• Puffiness that is worse in the morning, after salty food or a late night, and better later in the day.
• Swelling that sits low, on the upper cheek below the lid–cheek junction.

Often it is a mix: filler holding water, on top of fluid that pools easily in this area (Funt 2011). In a published series of 26 eyes with swelling after filler, ultrasound suggested the filler was pressing on the small veins that drain the area, and removing it under ultrasound guidance restored the flow (Schelke, J Cosmet Dermatol 2023). Ultrasound settles most of these questions in the same visit. True eye bags are covered on eye bag removal without surgery, and the differences are set out in eye bags, dark circles and tear troughs compared.

“Under the eye I treat the finding, not the request. If the problem is a shadow from a hollow, a polynucleotide will not touch it; if the problem is crepey skin, more filler will make it worse. Telling the two apart is the whole consultation.”

Dr Sin YongOn under-eye filler and what lies beneath it

Ultrasound mapping before dissolving under-eye filler

On high-frequency ultrasound, hyaluronic acid filler shows as a dark, well-defined pocket. The scan shows how deep it sits, just under the skin, within the muscle or on the bone, how large it is, whether there is one pocket or several, and which vessels run beside it (Wortsman 2015).

Why the scan changes the plan

• A superficial deposit causing a blue tint needs a different approach from a deep pocket holding water.
• Filler from more than one treatment can sit at different depths.
• A collagen-stimulating filler looks different from hyaluronic acid, which avoids injecting an enzyme that cannot work.

Published work describes ultrasound being used to find earlier filler before treatment and to place hyaluronidase directly into the deposit (Schelke 2018), and an expert review notes that ultrasound guidance can make dissolving more effective (Kroumpouzos and Treacy 2024). Dr Sin Yong performs the scan and the injection himself in the same visit. How the scan guides the needle is explained step by step on ultrasound-guided filler dissolving.

What happens when under-eye filler is dissolved

1. History. What was injected, when and where, as far as you know, and any treatment already tried. Having no records is fine.
2. Allergy check. You are asked about any previous reaction to hyaluronidase and to bee or wasp stings. A skin test is offered where there is any concern.
3. Ultrasound. Each side is scanned and the filler is mapped.
4. A small first dose. Hyaluronidase is placed into the mapped filler with a fine needle. For a non-urgent correction, the published guidance is a small first dose rather than a large one (King 2018).
5. Review. The area is reviewed at about 48 hours, once the enzyme has acted, and any further dose is titrated to what remains.

What it feels like

The injection is a brief sting, sometimes followed by a short warm or itchy feeling where the enzyme was placed. The enzyme starts working soon after it is placed, but the result is judged at the review, once any swelling from the injections has settled.

Before you come

• Bring the product names and dates if you have them.
• Tell the clinic if you are pregnant or breastfeeding; non-urgent dissolving is usually deferred.
• An infection or active skin problem around the eye is settled first.

Why the enzyme is aimed at the excess

Dissolving all of the filler under the eye can leave the area hollower than before, and can remove filler that was doing its job. With the deposit mapped, the enzyme goes where the excess is. If a hollow remains once the face has settled, it is reassessed then, never refilled on the same day.

A study comparing ultrasound-targeted injection with flooding a whole region found that the targeted approach used far less hyaluronidase: a mean of 122.5 units against 1,519.4 (Schelke, Aesthet Surg J 2023). That study was about blocked vessels rather than cosmetic correction, but the principle carries over: when the filler can be seen, less enzyme is needed to reach it.

After dissolving: what to expect, and what comes next

Some swelling, redness or a small bruise at the injection points is common, and settles. Avoid rubbing or massaging the area unless you have been told to, and contact the clinic if swelling increases, itching spreads or the area becomes hot and painful.

Once the excess has gone, the problem the filler was meant to hide may show again: a hollow, dark circles or loose skin. Dissolving removes filler; it does not change the skin or the fat pads. These are the options Dr Sin Yong discusses at the review:

• No further treatment. A natural contour without filler is a valid result in its own right.
• Loose or crepey lower eyelid skin. FSX laser is used for laxity of the lower eyelid skin.
• Pigmented dark circles. R2T2 is used for pigmentation under the eyes; see dark eye circles by type.
• A deep hollow. If filler is wanted again, it is considered only after at least two weeks, once the swelling has settled (Murray 2021), in a small amount and placed deep.

When under-eye filler is not hyaluronic acid

Hyaluronidase acts on hyaluronic acid only. Other materials are sometimes placed under the eyes: collagen stimulators such as poly-L-lactic acid (Sculptra), polycaprolactone (Ellansé) or calcium hydroxylapatite (Radiesse), injected collagen, fat and, in older or overseas treatments, non-absorbable fillers. None of these dissolves with the enzyme.

They are mapped with ultrasound in the same way. For excess collagen-stimulator material, including under the eye, Dr Sin Yong uses the Sculpting mode of Time Freeze Laser LCLR®, his own protocol, which is built to target excess material with no incision; whether it suits a particular under-eye is decided at the assessment. Inflamed or infected lumps are treated medically first. A mix of hyaluronic acid and other products is common; see non-hyaluronic acid filler lumps under the eye and hard lumps after filler.

Risks of dissolving under-eye filler

• Swelling, redness, itch or bruising at the injection points.
• Over-correction: dissolving more than intended can leave a hollow, which is why the dose is staged.
• Allergy: uncommon, ranging from local swelling to, rarely, a more serious reaction. This is why a history is taken and a skin test is offered where there is any concern.
• No effect on anything that is not hyaluronic acid.

Like any medical treatment, dissolving has limits, which Dr Sin Yong explains at the assessment alongside the alternatives, including no treatment.

Urgent: a change in vision or eye pain after filler means calling 995 or going to the nearest emergency department now. Skin that turns pale, dusky or mottled, or pain that is getting worse, needs urgent assessment by the doctor who injected you, or at A&E. See the warning signs of a blocked blood vessel after filler.

How Dr Sin Yong approaches under-eye filler correction

Under-eye filler is one of the concerns patients bring to Dr Sin Yong most often. His approach is the same each time: find out what is there before treating it, aim the enzyme at what is in excess, and leave time between steps. He examines you, performs the scan and places the enzyme himself, and the plan, including what he would not do and what decides the fee, is set out in writing.

You do not need to have been treated here. Doctors can refer patients, as set out on for GPs: when to refer, and patients travelling to Singapore can plan their visit through international patients. For filler problems in other areas, see filler dissolving in Singapore.