Medically reviewed by Dr Sin Yong · Last reviewed · 20 min read · Doctor-performed, never delegated · Jump to questions
Dr Sin Yong · MBBS (NUS) · MRCS (Edin) · MSc Aesthetic Medicine with Distinction (Queen Mary, London) · MSc Practical Dermatology (Cardiff) · International KOL
Overfilled, puffed-up or unnatural-looking filler results — often called 'pillow face' — can be reversed and refined. Dr Sin Yong uses ultrasound-guided hyaluronidase to dissolve excess or misplaced hyaluronic acid filler, locating each deposit under real-time imaging before treatment, then guides patients through a carefully considered restoration of natural facial proportions.
Pillow face is the rounded, puffy and heavy look that develops when too much filler, or filler in the wrong place, blurs the face's natural contours. It usually builds up over repeated top-ups. Where hyaluronic acid filler is the cause, it can be dissolved selectively with hyaluronidase, once ultrasound has shown where the product sits.
Pillow face occurs when filler has been over-placed — either too much volume in total, placement in the wrong anatomical planes, or filler in locations that create an unnatural appearance. Cheeks that look artificially protruberant, lateral cheek bulging, loss of natural skeletal definition, and an overall 'puffy' look are characteristic. This can result from a single over-treated session or from accumulation of filler over multiple sessions without allowing previous product to metabolise.
The first step in addressing pillow face is dissolution of the excess or misplaced HA filler using hyaluronidase enzyme. Dr Sin Yong maps the distribution of filler using clinical examination together with ultrasound imaging, then dissolves selectively — targeting the areas contributing most to the unnatural appearance while preserving areas where volume is appropriate. This ultrasound-guided filler dissolving approach allows hyaluronidase to be placed into the filler deposit itself, rather than the surrounding tissue. After dissolution and a period of healing, natural proportions are reassessed and refinement filler can be placed if desired.
“More filler cannot fix a face that already has too much filler.”
— Dr Sin Yong
“Puffy after Sculptra isn't always pillow face.”
Dr Sin YongOn puffiness after collagen stimulators · from his Instagram explainer series
Not every unnatural result needs more filler to correct it. When a face looks overfilled, the instinct at some clinics is to add further volume to balance or lift — but adding product to an already over-volumised face often deepens the very problem a patient came in to resolve.
Dr Sin Yong's approach to pillow face is the opposite: identify what is excessive, and let it go down. Where hyaluronic acid filler is the cause, ultrasound-guided hyaluronidase allows the excess to be dissolved selectively, returning the face toward its own natural proportions rather than layering more on top.
Dissolve over-placed cheek filler that creates an overly protruberant, unnatural or 'apple cheek' appearance.
Address filler that has migrated laterally or been placed in the lateral cheek, creating bulging or distortion of the facial oval.
Dissolve overfilled or misplaced under-eye filler that causes puffiness, bluish discolouration or exacerbation of hollowing.
When excess filler obscures the natural bone structure of the cheeks, jaw and temples, dissolution restores the natural skeleton.
Address filler that has accumulated over many sessions across multiple providers, creating an unnatural total volume.
Dissolve filler that has migrated from its original placement site, creating bulging or asymmetry.
When filler has been placed over several sessions or across different providers, its exact location and depth are rarely known. Dr Sin Yong uses ultrasound imaging to see where hyaluronic acid filler sits beneath the skin before any hyaluronidase is placed. Being able to dissolve filler with ultrasound guidance means the enzyme can be directed into the filler deposit itself, while mapping the position of nearby vessels and structures.
For pillow face specifically, this matters because the goal is selective — reducing over-volumised areas while leaving appropriate volume untouched. Dr Sin Yong's approach is to palpate and take a full history first, assess the face in both static and dynamic movement, and mark out the areas of concern — and only then use ultrasound to confirm that particular zone before any hyaluronidase is placed. Ultrasound-guided hyaluronidase supports this selectivity: each deposit is located, assessed for depth, and treated in a targeted way. Where filler cannot be visualised or has broken into very small pockets, Dr Sin Yong discusses the limitations openly at consultation, as complete removal is not always possible in a single round.
Dr Sin Yong begins with a thorough history and clinical palpation, then assesses the face both static and in movement to understand how the filler behaves dynamically. The relevant areas are marked out, and ultrasound imaging is then used to visualise each marked zone — confirming the location and depth of filler beneath the skin. Pre-treatment photography establishes baseline.
A selective dissolution plan identifies areas to dissolve and areas to preserve. Under ultrasound guidance, hyaluronidase is diluted and directed into the mapped filler deposits at target locations.
Hyaluronidase is injected at planned sites. Dissolution develops over the following days. Multiple sessions may be needed for heavy filler loads.
At review, Dr Sin Yong reassesses the natural face after dissolution. If refinement filler is desired, a new placement plan is designed based on natural proportions.
Not every overfilled face is caused by filler. Face fat grafting — also called fat transfer — moves your own fat into the cheeks, temples or under the eyes. When more of it survives than expected, or it settles unevenly, the face can look full, heavy or lumpy in a way that resembles pillow face.
If your face feels too full after fat grafting, or you are considering fat transfer and want to understand how it differs from filler, an assessment comes first. Options are discussed in person once it is clear what is in the face and where.
| Cause | What it tends to look like | How it is confirmed | How correction is approached |
|---|---|---|---|
| Too much hyaluronic acid filler in total | A rounder, wider face that looks puffy at rest and heavier when smiling | Treatment history, examination at rest and in movement, then ultrasound | Selective dissolving with hyaluronidase, preserving areas where volume is appropriate |
| Filler placed in the wrong plane or area | Bulging at the side of the cheek or a widened facial oval | Static and dynamic assessment, then ultrasound of the marked zone | Targeted dissolving of the misplaced deposit, with any refinement planned afterwards from natural proportions |
| Accumulation from repeated top-ups | Gradual loss of definition across the cheeks, jaw and temples | History across providers; ultrasound often finds product thought to have gone | Dissolving in planned rounds, with the interval set at review |
| Filler migration | Fullness away from the original site, such as above the cheek or under the eye | Ultrasound locating where the product now sits | Dissolving at the new location, where the filler is hyaluronic acid |
| Collagen-stimulating fillers such as Sculptra or Ellansé | Firm fullness that does not respond to hyaluronidase | Treatment history and ultrasound | Not dissolved by hyaluronidase; managed with techniques suited to the material and assessed individually |
| Fat grafting (fat transfer) | Fullness or lumps that may change with body weight | History, examination and, where useful, ultrasound | Hyaluronidase does not act on fat, so a different plan is discussed once fat and filler are told apart |
When a heavy-looking face reflects descent rather than lost volume. A short video from Dr Sin Yong’s Instagram, with captions.
Pillow face treatment is mainly selective dissolving of hyaluronic acid filler, so the cautions are those of hyaluronidase plus a question of fit. A known allergy to hyaluronidase or a history of significant reactions to bee or wasp stings is raised before any elective dissolving, and elective treatment is usually deferred during pregnancy and breastfeeding. Active infection or inflamed skin over the cheeks is settled first, and a red, warm or tender lump is examined before anything is injected.
Dissolving is also the wrong tool when the fullness is not hyaluronic acid. Grafted fat, Sculptra, Ellansé and Radiesse do not respond to hyaluronidase, and fluid retention, weight change or descent of the midface can look like over-filling while needing a different plan.
Expectations matter. Someone who wants a fixed amount of volume removed in one visit, or who has stretched skin after years of over-filling, needs to know that dissolving is staged and that tissue may not return exactly to how it was. Suitability is decided at consultation.
Selective dissolving is a well-established procedure, but it carries risks. Swelling, tenderness and bruising at the injection points are common, and the face often looks puffier for a short time before the true picture shows. Local itching or swelling can be an allergic response; rarely, a wider allergic reaction occurs, so patients are observed afterwards and emergency treatment is kept on hand.
The commonest disappointment is over- or under-correction. Hyaluronidase also acts on the body's own hyaluronic acid, so a cheek can look flatter or more hollow than expected for a while, and ageing that filler was masking is revealed. Filler broken into small pockets may need more than one round, and skin stretched by years of volume may not fully tighten.
These risks are reduced by mapping each deposit with ultrasound before injecting, directing the enzyme into the filler rather than the surrounding tissue, dissolving in planned rounds with review between them, and waiting until the face has settled before any new filler is considered.
People whose puffiness comes from fat grafting or non-HA products, or who expect all filler to disappear in one round, tend to respond poorly.
The fee depends on the areas treated, how much filler is present and how widely it has spread, whether ultrasound mapping is needed, the amount of hyaluronidase used, and whether refinement with new filler is considered afterwards. A written quote is given at consultation, after a history, examination and, where useful, ultrasound. The consultation also decides whether dissolving is advised at all, since puffiness can have causes other than HA filler.
How quotes work at this practice: how we quote.
It acts only on hyaluronic acid filler and does not dissolve fat, calcium hydroxylapatite, polycaprolactone or poly-L-lactic acid.
More product in an already over-volumised face usually deepens the problem, so assessment and selective dissolving come first.
The pillow face now has a medical name: “facial overfilled syndrome”, the result of repeated or misplaced filler that looks worse with expression and with age-related sagging (Lim, 2024). An anatomical study of 25 volunteers and 72 cadavers identified a transverse facial septum that may explain why an overfilled face looks heavier when smiling (Cotofana et al., 2020).
In 28 patients with overfilled faces and impaired expression, ultrasound located the filler layer by layer, and a mean of 81.6 units of targeted hyaluronidase moved the mouth corners back towards a natural position (Schelke et al., 2023).
MRI studies show hyaluronic acid filler can persist for years (Master et al., 2024), and one 2026 study measured filler volumes larger than the amounts recorded as injected, suggesting the gel had expanded (Issa et al., 2026). That is why Dr Sin Yong maps first and dissolves selectively rather than flooding the whole face.
Two main paths exist. If existing filler is the problem, targeted dissolving (ultrasound-guided where appropriate) removes it. If the face needs support rather than volume, collagen-stimulating energy protocols such as the VF Lift or Time Freeze Laser lift and firm using your own tissue response — without adding product to a face that already has too much.
'Pillow face' describes an over-filled, rounded look that can develop when too much filler is placed over time, blunting natural facial contours. Dr Sin Yong assesses where product has accumulated and plans correction to restore more natural proportions.
Signs can include a puffy or heavy appearance, loss of natural contour, or filler that looks or feels different from the surrounding tissue. Ultrasound assessment helps confirm where and how much product is present before any correction.
Dissolving hyaluronic acid filler with hyaluronidase is a well-established procedure, but it should be done carefully by an experienced doctor, as over- or under-dissolving is possible. Dr Sin Yong uses ultrasound guidance to target only the intended product.
Migrated hyaluronic acid filler can usually be dissolved and, if needed, replaced more precisely; ultrasound helps locate product that isn't obvious on the surface. Non-HA products are assessed separately, as they cannot be dissolved with hyaluronidase.
Hyaluronidase dissolves hyaluronic acid (HA) fillers only. Non-HA fillers such as Radiesse, Sculptra and Ellanse cannot be dissolved with hyaluronidase. Dr Sin Yong assesses the likely composition of your filler at consultation.
Ultrasound-guided filler dissolving uses high-resolution ultrasound imaging to locate hyaluronic acid filler beneath the skin before hyaluronidase is placed. Seeing the depth and position of each deposit — and of nearby vessels — allows Dr Sin Yong to direct the enzyme into the filler itself and to work selectively, which is particularly useful in pillow face where the aim is to reduce some areas while preserving others.
Filler can be dissolved without imaging, but the injector is then relying on palpation and estimation of where the filler sits. Using ultrasound to dissolve filler adds real-time visualisation of the deposit and surrounding anatomy. Dr Sin Yong uses ultrasound guidance as part of the assessment and dissolution process for pillow face correction.
The number of rounds is planned individually. Mild overfilling may need less; heavy filler loads accumulated over many sessions typically need more. The interval between rounds is set at review.
You will look like your natural self — which may feel unfamiliar if you have had filler for a long time. Some patients experience a brief period of apparent hollowing before natural tissue rehydrates. Dr Sin Yong prepares you for this at consultation.
Dr Sin Yong recommends an interval after dissolution before placing any new filler, with the timing set at review. This allows the hyaluronidase to clear and the tissue to settle so that natural proportions can be reassessed before any new product is placed.
Yes. Working with an experienced injector who uses restraint, anatomical knowledge and a philosophy of less-is-more lowers the chance of overfilling. Dr Sin Yong's approach emphasises natural results and conservative volume placement.
Ellanse and Sculptra are collagen-stimulating fillers (polycaprolactone and poly-L-lactic acid) and are not dissolved by hyaluronidase, which only reverses hyaluronic acid. Where these have been overfilled or have led to excess collagen stimulation, Dr Sin Yong assesses the affected areas with ultrasound and manages them using techniques appropriate to the material, working to restore more natural, balanced proportions. Because correcting non-HA fillers is more involved than reversing HA, each case is assessed individually at consultation.
Not reliably. Hyaluronic acid filler breaks down slowly, and studies using imaging have found product in the face long after it was expected to have gone, so waiting may take a long time and stretched tissue may not fully recover. Where the cause is hyaluronic acid filler, selective dissolving is usually the more predictable route, and the decision is made after assessment.
The fee depends on the areas treated, how much filler is present, whether ultrasound mapping is needed, the amount of hyaluronidase used and whether new filler is considered afterwards. A written quote is given at consultation after assessment. The consultation also decides whether dissolving is advised, as not every puffy face is caused by HA filler.
It is worth considering when HA filler has left the face rounded, heavy or unnatural and you want to reduce it selectively. It is a poorer fit when the puffiness comes from fat grafting, Radiesse, Ellanse or Sculptra, which hyaluronidase does not dissolve, or when more volume is what you actually want.
No duration can be promised. Dissolving acts on the filler present, so how the face looks afterwards depends on how much product was removed, whether any remains, ageing, weight change and whether new filler is added. Review timing and any further round are set at consultation.
It can cause swelling and bruising, and dissolving may be incomplete or go further than intended, leaving a flatter look. Heavy filler loads can need more than one round. It does not work on non-HA filler or fat, and allergy to hyaluronidase is possible. Fee depends on the areas and plan.
Soon after treatment it is usually swelling, which settles over about two weeks. Puffiness that persists can be filler placed in excess, layered over years, or migrated into the wrong plane. Hyaluronic acid also draws water. An examination, with ultrasound where needed, tells these apart before anything is dissolved.
It is the term used in the medical literature for a face that looks heavy, rounded or altered in expression because of filler placed in excess or in the wrong plane. It tends to develop gradually with repeated treatments, and correction is planned by region, often in stages.
Swelling from a new treatment usually settles over about two weeks, so the result is judged after that. Earlier review is needed for pain that worsens, skin colour change or any vision change, which are urgent. Dissolving too early can remove filler that would have settled.
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Patients who have experienced pillow face frequently discover that structural lifting — rather than additional volume — is what their face actually needs. Dr Sin Yong's two proprietary lifting protocols deliver structural rejuvenation that reduces reliance on filler over time.
Pillow face treatment in Singapore involves careful, ultrasound-guided filler dissolving to reduce over-volumised areas and restore natural facial proportions. Dr Sin Yong uses ultrasound imaging to locate hyaluronic acid filler before hyaluronidase is placed, so that filler can be dissolved with ultrasound guidance in a targeted way at his aesthetic practice on Orchard Road — within convenient reach of Somerset, City Hall and the wider Central and town areas of Singapore.
“A real part of my week is dissolving filler someone else put in.”Dr Sin Yong
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Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 20 September 2026 · Editorial policy
Expert filler assessment, reversal and refinement. By appointment at Orchard Road, Singapore.
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