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Watch
Dr Sin Yong explains
Why the timing of treatment matters as much as the method for surgical scars. A short video from Dr Sin Yong’s Instagram, with captions.
Who treats acne scars in Singapore: aesthetic physician, dermatologist or plastic surgery specialist?
Acne scars in Singapore are treated by aesthetic physicians, dermatologists and plastic surgery specialists, and the more useful question is whether the doctor sorts each scar by type and either offers or refers for what that type needs. "Specialist" is a protected title: only doctors on the Specialists Register kept by the Singapore Medical Council may use it, and dermatology and plastic surgery specialists are on that register. Dr Sin Yong is an aesthetic physician, not a registered specialist. He holds an MSc in Aesthetic Medicine with Distinction (Queen Mary University of London) and an MSc in Practical Dermatology (Cardiff University).
The work overlaps but is not identical. Dermatologists diagnose and manage skin disease, including acne and its medical treatment, and many also carry out scar procedures. Plastic surgery specialists perform surgical revision, such as punch excision, punch elevation, punch grafting and formal scar revision. Non-surgical scar work, including subcision, fractional CO2 resurfacing, TCA CROSS and collagen-stimulating injectables, is what 4D Scar Reconstruction is built from.
Referral is appropriate when an isolated scar is too deep or too wide for TCA CROSS or resurfacing and needs a punch technique, or when a lesion's diagnosis is uncertain. In those cases Dr Sin Yong refers to a plastic surgery or dermatology specialist and plans any resurfacing around that treatment.
Acne scar options compared by what each one does and where it stops| Option | What it does | What it cannot do | What to expect afterwards | Who it tends to suit |
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| 4D Scar Reconstruction | Sequenced protocol: subcision releases tethering, Radiesse supports the space, TCA CROSS and CO2 resurface. | Does not promise a set outcome; response depends on scar type, depth and tethering. | Pinpoint scabbing after resurfacing and bruising where subcision was done; redness that settles. | Depressed acne or surgical scars of several types, sorted at assessment first. |
| Standard laser resurfacing alone | Works on surface texture only, one dimension of the scar. | Does not release tethering or restore volume lost beneath the scar. | Scabbing and redness that settle as the skin heals; discussed at consultation. | Superficial surface irregularity without deeper tethering. |
| TCA CROSS | Chemical stimulation aimed at narrow ice-pick tracts. | Does not release tethered scars or resurface the wider treatment zone. | A local skin reaction that settles; discussed at consultation. | Narrow, deep ice-pick scars within a wider plan. |
| S3 Resurfacing Laser and FSX Laser | Finer surface refinement of residual superficial scarring once deeper structure is addressed. | Does not release deeper tethering; used after the deeper components are treated. | Healing redness that settles; progress reviewed against standardised photography. | Residual superficial scarring following the 4D protocol. |
| Referral to a plastic surgery or dermatology specialist | Punch excision, elevation, grafting or formal revision for isolated deep or wide scars. | Not performed by Dr Sin Yong, who is an aesthetic physician, not a registered specialist. | Recovery set by the specialist; any resurfacing is planned around it. | Isolated scars too deep or wide for resurfacing, or with uncertain diagnosis. |
Who it suits, who should wait, who is referred on
Tends to suit
- Depressed acne scars of more than one type
- Surgical or injury scars that are depressed
- Scars with tethering and volume loss, not just surface texture
- Skin that is currently free of active infection
Better to wait
- Active, inflamed acne, until it is controlled
- Recent isotretinoin, until cleared at consultation
- A wish for a fixed or exact outcome
Referred on
- Isolated scars too deep or wide for TCA CROSS or resurfacing → plastic surgery specialist for a punch technique
- Lesions of uncertain diagnosis → dermatology specialist
Who should not have this treatment
- Active acne, infection or open wounds in the treatment area
- Recent isotretinoin use
- Pregnancy or breastfeeding
- Keloid tendency (weighed before subcision or resurfacing)
- Blood-thinning medicines or a bleeding tendency
- Known allergy to a product or injectable to be used
People who want a fixed, exact result, or whose scar needs surgical revision, tend to respond poorly or to need a different route.
What happens, step by step
- Consultation and examination: scars are sorted by surface texture, depth, tethering and volume
- Written plan and quote: the sequence and components are set out after assessment
- Treatment day: release first, then volume support, then resurfacing as planned
- Review and refinement: progress is reviewed and finer surface refinement considered if needed
Risks, side effects and when to call
Expected effects include pinpoint scabbing after resurfacing, bruising where subcision has been performed, and redness that settles as the skin heals. Recovery varies between people and with the depth treated. Less often there can be prolonged redness, pigment change, infection, lumps from an injected product, or a scar that responds less than hoped. Because several methods are layered, each carries its own risks, and these are explained at consultation. Anything painful, spreading or unexpected should be reviewed rather than waited out.
Aftercare
First 24 hours
- Keep the skin clean and do not pick at scabs
- Use only the soothing products you were given
First week
- Let pinpoint scabbing fall away naturally
- Expect some bruising where subcision was done and avoid heavy exercise or heat
- Attend review as planned
Sun
- Avoid direct sun and tanning while the skin heals
- Use broad-spectrum sunscreen once advised
Skincare
- Use a plain, gentle cleanser and moisturiser
- Restart retinoids and acids only when the clinic advises
When to call
- Pain, spreading redness, warmth or pus
- Firm lumps or swelling that does not settle
Before you book
- Declare all medicines, including isotretinoin and blood thinners
- Avoid sun exposure and tanning before the visit
- Tell the clinic if you are pregnant, breastfeeding or planning pregnancy
- Pause strong skincare actives such as retinoids and acids as advised
- Bring photos of the scars, any surgical history and previous treatment records
Myths we hear in clinic
“Resurfacing the scar surface is enough to fix a depressed scar.”A tethered scar keeps being pulled down from below, so release comes before resurfacing.
“One device can treat every dimension of a scar.”Texture, depth, tethering and volume are different features, which is why a sequenced combination is used.
Frequently Asked Questions
What is the difference between 4D Scar Reconstruction and standard laser resurfacing?
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Standard laser resurfacing addresses surface texture only (one dimension). 4D Scar Reconstruction simultaneously addresses surface texture, dermal depth, fibrous tethering and volumetric deficit — all four architectural dimensions of the scar.
How many sessions are needed?
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A course is planned individually after assessment. Structural scar remodelling accumulates across sessions.
Is there downtime?
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5–7 days of scabbing following treatment, and 7–14 days of possible bruising. Redness, mild swelling and scabbing are expected and resolve progressively.
What scar types are treated?
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Rolling scars, boxcar scars, icepick scars, hypertrophic scars, post-surgical scars and stretch marks — each using the most appropriate component of the 4D protocol.
When do results become visible?
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Collagen remodelling after fractional resurfacing and subcision is a gradual biological process, so the skin continues to change after the treated surface has healed. Progress is reviewed against standardised photography rather than estimated.
What is the cost of acne scar removal in Singapore?
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What the 4D Scar Reconstruction protocol costs depends on the extent of the scarring, how many dimensions the assessment finds need addressing, whether one or several modalities are combined, and how the plan is staged. Dr Sin Yong sets this out at consultation, once the scarring has been examined.
Do I need a GP referral to have acne scars treated in Singapore?
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Not for a private clinic: you can book an assessment directly. Subsidised appointments at public dermatology services generally need a referral from a polyclinic or GP. Whichever route you take, the first visit should be an examination that sorts the scars by type before any treatment is chosen.
What should I ask at an acne scar consultation?
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Ask which scar types the doctor sees on your skin, which method is matched to each and why, what each method cannot do, how post-inflammatory pigmentation risk is managed in your skin type, and when a scar would be referred for a surgical technique. Fees are set out at consultation, once the scars have been examined.
How much does 4D Scar Reconstruction cost in Singapore?
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The fee depends on the area and number of zones, which components the scars need (subcision, Radiesse, TCA CROSS, point-shot or fractional CO2), the amount of product used and whether refinement is added later. A written quote is given at consultation after assessment, and the consultation decides whether the protocol is advised at all.
Is 4D Scar Reconstruction worth it?
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It is worth discussing for depressed acne or surgical scars with tethering and volume loss, where surface resurfacing alone addresses only one feature. It is a poorer fit for flat marks, for isolated scars needing a punch technique, or for anyone expecting a fixed outcome, since response depends on scar type, depth and tethering.
How long does 4D Scar Reconstruction last?
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No duration can be promised. Longevity depends on the scar type and depth, how long the scar has been tethered, skin ageing, sun exposure and any new breakouts. Structural change builds as the skin remodels, so progress is reviewed over time. Review timing and any later refinement are set at consultation.
What are the disadvantages of 4D Scar Reconstruction?
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It is a layered, multi-step plan, so recovery can include pinpoint scabbing, bruising and redness. Injectable products can cause lumps, and some scars respond less than others. It is not suited to active acne, and scars needing surgical revision are referred on instead. Outcomes cannot be promised and are discussed honestly at assessment.
