FSX Laser is Dr Sin Yong's combination laser skin protocol using 1540 nm erbium glass and 1927 nm thulium wavelengths. The 1540 nm wavelength reaches the dermis for collagen work; 1927 nm acts more superficially on pigment and texture. It is directed at fine lines, pores, superficial scars, redness and early laxity; settings follow assessment.
- FSX Laser is Dr Sin Yong's combination protocol using 1540 nm erbium glass and 1927 nm thulium wavelengths.
- The 1540 nm wavelength reaches the dermis for collagen work; 1927 nm acts more superficially on pigment and texture.
- It is directed at fine lines, pores, superficial scars, redness and early laxity, with settings set after assessment.
- Deep acne scars need a different protocol, and heavy skin excess is referred to a plastic surgery specialist.
- Dr Sin Yong, an aesthetic physician, adjusts settings for each zone and personally performs every treatment.
- FSX Laser Singapore — Six Clinical Targets, One Session
- What the FSX Laser Addresses
- Every Zone FSX Laser Targets
- Chemical peel or FSX Laser: how do they compare?
- Korean glass skin treatment: what laser can and cannot do
- Who should not have FSX Laser?
- Is FSX Laser safe? The risks to know
- What recovery looks like after FSX Laser
- Who it suits, who should wait, who is referred on
- Before you book
- What determines the fee
- Myths we hear in clinic
- Frequently Asked Questions
- The FSX Multi-Pass Protocol
- Laser Skin Rejuvenation Singapore — What to Look For
- Dr Sin Yong explains
FSX Laser Singapore — Six Clinical Targets, One Session
FSX Laser — Flawless Smooth Skin — is Dr Sin Yong's signature LCLR® (Laser Collagen Lipo Remodelling) protocol using thulium laser energy and erbium glass laser energy. Unlike conventional laser toning Singapore treatments, FSX is not a single-pass brightening treatment — it is a multi-target clinical protocol addressing six distinct concerns in one coordinated session.
FSX Laser is used to lighten melasma and pigmentation, to improve superficial scars, and to refine and reduce the appearance of enlarged pores. The settings are tailored to your skin and concern at consultation.
The six key highlights of FSX are: lifting heavy or droopy upper eyelids without surgery, smoothing fine wrinkles through collagen stimulation, reducing inflammation in active acne, helping post-acne redness settle, improving the depth of superficial scars, and tightening skin laxity across the face and neck. LCLR® is calibrated by Dr Sin Yong in real time — energy parameters adjusted per zone based on tissue response observed during the session itself.
FSX settings are adjusted for darker skin types, including Fitzpatrick V and VI, after assessment. Numbing cream is applied before the session for comfort. Recovery varies; in certain cases mild scabs can occur in treated zones for approximately 3–7 days and should be left to resolve naturally.
What the FSX Laser Addresses
“Texture is not a filter problem. Pores, fine lines and roughness are structural — treat the structure.”
— Dr Sin Yong
Every Zone FSX Laser Targets
FSX addresses loose skin across the face, neck, eyelids and body — and separately targets scars, redness and stretch marks. Select a category then hover any dot to explore what the FSX protocol is directed at in that zone.
FSX Laser — Flawless Smooth Skin
Skin Tightening & Scar Treatment Zones
Select Skin Tightening to see loose skin zones across the face, neck, eyelids and body — or Scars & Redness for acne scars, burn scars, surgical scar redness and stretch marks. Hover any dot to explore.
← HOVER A ZONE TO EXPLORE
Chemical peel or FSX Laser: how do they compare?
A chemical peel and FSX Laser both aim at the quality of the skin's surface, but they reach it differently. A peel applies an acid that loosens and removes surface cells to a depth set by the acid and its strength, from a light exfoliation to a deeper resurfacing. FSX is a non-ablative fractional laser: the 1540 nm wavelength heats narrow columns of dermis to prompt collagen remodelling while the skin between them stays intact, and the 1927 nm wavelength works superficially on pigment and texture.
The practical difference is control over depth. A light peel brightens and smooths the surface but does little for dermal collagen; a deeper peel reaches further at the cost of more peeling and, in darker skin types, a greater risk of post-inflammatory hyperpigmentation. A fractional laser can treat the dermis while leaving most of the surface undisturbed, which is why it is used for pores, fine lines and shallow scars. Neither lifts sagging tissue. For mild dullness or comedonal acne a light peel may be enough; which approach suits your skin is decided at assessment.
Korean glass skin treatment: what laser can and cannot do
Glass skin is a K-beauty term for skin that looks clear, even and smooth enough to reflect light uniformly. The look depends on several things at once: even pigment, fine texture with less visible pores, little redness and good hydration. No single treatment supplies all of them, and a filter or a highlighting routine creates the impression on the surface rather than in the skin.
Clinically, the request is broken into its parts. FSX Laser is directed at several of them within one plan: 1927 nm at superficial pigment and surface texture, 1540 nm at the dermal collagen around pores and fine lines, with settings adjusted for darker skin types. Hydration is a separate job, which is where a skin booster may sit alongside it, and daily sun protection is what keeps pigment from returning. Pores can be made less visible but not smaller, and skin that is naturally textured or scarred will not look like a filtered image. The aim is healthier, more even skin, discussed honestly at consultation.
| Option | What it does | What it cannot do | Typical recovery | Who it tends to suit |
|---|---|---|---|---|
| FSX Laser (1540 nm and 1927 nm) | Non-ablative fractional laser: 1540 nm heats the dermis to prompt collagen remodelling, while 1927 nm acts superficially on pigment and surface texture | Replace lost volume, lift descended tissue or release deep tethered scars | Redness that settles; occasionally fine scabbing in treated zones, which is left to shed | Fine lines, pores, superficial scars, uneven tone and early laxity, with settings adjusted for darker skin |
| Chemical peel | An acid solution loosens and removes surface layers to a chosen depth, from light exfoliation to deeper resurfacing | Treat the dermis in a fractional pattern while leaving the surface intact; deeper peels carry more pigment risk in darker skin | From mild flaking to several days of peeling, depending on depth | Mild dullness, superficial pigment and comedonal acne, at a depth chosen for the skin type |
| Skin booster injection | Places hyaluronic acid or polynucleotides in the dermis to act on hydration and skin quality | Treat pigment, resurface texture or lift tissue | Small raised bumps at the injection points that settle | Dehydrated, dull or crepey skin, often planned alongside laser |
| Picosecond laser | Fragments pigment mainly by a pressure effect; in fractional mode prompts fine dermal remodelling | Treat laxity or the hormonal drivers of melasma | Redness, with darkening or fine crusting over treated spots | Discrete pigment such as sun spots and freckles, and fine texture |
| Fractional CO2 resurfacing (S3 Resurfacing) | Ablative fractional laser that removes microscopic columns of tissue to rebuild dermal collagen | Avoid visible recovery; it is not a light maintenance treatment | Redness, crusting and peeling that settle; the length depends on the settings used | Deeper acne scars and etched lines where non-ablative treatment is not enough |
Who should not have FSX Laser?
FSX Laser is postponed during pregnancy, on sunburnt or freshly tanned skin, and where there is an active infection in the area, such as a cold sore or impetigo. Anyone who gets cold sores should say so, because fractional laser can trigger an outbreak and antiviral cover may be advised beforehand. Photosensitising medicines, current or recent isotretinoin, and light-sensitive conditions such as lupus are discussed before treatment, as advice on timing varies.
A tendency to keloid scarring, active vitiligo, poorly controlled diabetes and other causes of slow healing call for caution or a different plan. Melasma is not a bar, but it is treated with its own conservative settings, and darker skin types are assessed carefully because the risk of post-inflammatory hyperpigmentation rises when settings are too strong for the skin. Deep ice-pick or rolling scars, marked laxity and lost volume sit outside what a non-ablative laser reaches. Suitability is decided at consultation, after Dr Sin Yong has examined your skin and taken a medical history.
Is FSX Laser safe? The risks to know
The expected effects are redness, warmth and mild swelling, which usually settle within a few days, sometimes with fine scabbing in treated zones that should be left to shed on its own. Less common effects include acne-like breakouts, a cold sore outbreak, redness that lingers, and temporary darkening of the skin.
A retrospective study of 961 consecutive treatments with a 1,550 nm non-ablative fractional laser recorded complications after 7.6% of treatments, most often acne-like eruptions and cold sore outbreaks, with post-inflammatory hyperpigmentation more frequent in darker skin types. FSX uses a closely related 1540 nm erbium glass wavelength alongside 1927 nm thulium, so the same kinds of risk apply. Risk is reduced by assessing skin type at every session, settings matched to the concern and the skin, antiviral cover where there is a history of cold sores, gentle skincare and strict sun protection afterwards, and leaving any scabs to fall away naturally. Anything unexpected is reviewed by Dr Sin Yong.
What recovery looks like after FSX Laser
The sequence below describes phases, not a timetable: how quickly each passes depends on the settings used, the area and the person, and is discussed at consultation.
- Immediately afterRedness, warmth and mild swelling across the treated zones; the skin may feel tight and look flushed.
- The first eveningGentle skincare only; a cool compress eases warmth, and make-up is usually possible once the skin is calm.
- The following daysRedness settles on its own; after higher-intensity passes fine scabs can form and should be left to shed naturally.
- As the skin settlesCollagen remodelling develops gradually, and post-acne redness fades over a course planned individually; diligent sun protection continues.
- Follow-upAny lingering redness, acne-like breakout or darkening is reviewed, and settings for the next visit are adjusted to the skin's response.
Who it suits, who should wait, who is referred on
Tends to suit
- Fine lines, enlarged pores and uneven texture
- Superficial scars and post-acne redness
- Early skin laxity on the face and neck
- Pigmentation that has been assessed and judged suitable
Better to wait
- Pregnancy or breastfeeding
- Active infection, cold sore or open wounds in the area
- Recent isotretinoin or a recent tan or sunburn
- Unrealistic goals, such as a single pass replacing surgery
Referred on
- Deep ice-pick or rolling acne scars, which need a dedicated scar protocol
- Heavy upper eyelid or neck skin excess, referred for surgical assessment
- Pregnancy and breastfeeding
- Recent isotretinoin use, reviewed individually
- Active infection, cold sore or inflammatory skin disease in the area
- Recent sun exposure, tan or sunburn
- Tendency to keloid scarring or poor healing
- Photosensitising medication or unrealistic expectations of change
People with deep acne scars, heavy skin excess, recent tans or who cannot avoid the sun tend to respond poorly, because FSX Laser is the wrong tool or the wrong moment for them.
Before you book
- Declare isotretinoin, photosensitising medicines and any recent laser or peel
- Tell the clinic about pregnancy, breastfeeding, cold sores and keloid history
- Avoid sun exposure and tanning before the visit
- Pause retinoids, acids and exfoliants if advised
- Bring photographs of your skin, a list of your skincare products and any records of past laser treatment
What determines the fee
The fee for FSX Laser depends on the areas treated, the concerns being addressed, the number of passes and zones, the consumables used, and whether it is combined with another treatment. Settings are tailored to your skin at consultation. A written quote is given after assessment, and the consultation also decides whether treatment is advised at all, since pigment, melasma or active acne may call for a different or preceding plan.
How quotes work at this practice: how we quote.
Myths we hear in clinic
It is a multi-pass protocol with settings adjusted per zone, directed at several concerns.
Laser aims to refine texture gradually, and the extent varies between people.
Frequently Asked Questions
Gentle skincare and diligent sun protection are advised while the skin settles, and Dr Sin Yong gives specific aftercare based on the settings used and your skin type.
The FSX Multi-Pass Protocol
Unlike single-pass laser treatments targeting one concern, the FSX LCLR® applies multiple calibrated passes at different energy levels — each addressing a different skin layer and concern within the same session.
Pass 1 (Surface Brightening): Low-energy thulium laser passes target surface melanin — reducing pigmentation without ablating the skin surface and with settings chosen to keep the risk of PIH low.
Pass 2 (Pore Refinement): Targeted peripilosebaceous thermal energy firms the collagen around enlarged pores so they appear less visible.
Pass 3 (Dermal Remodelling): Higher-fluence passes deliver subdermal heating to stimulate fibroblast activity and new collagen synthesis over 4–6 weeks.
Pass 4 (Refinement Sweep): A final low-fluence smoothing pass homogenises the treatment effect, improving overall skin clarity and tone uniformity.
Question not answered here? Ask on WhatsApp, use the enquiry form, or browse 100 questions patients ask.
What is FSX Laser? FSX Laser is Dr Sin Yong's combination laser skin protocol using 1540 nm and 1927 nm wavelengths: the 1540 nm wavelength reaches the dermis for collagen work, while 1927 nm acts more superficially, where pigment and surface texture sit.
- Platform
- Combination laser — 1540 nm and 1927 nm
- Why two wavelengths
- 1540 nm reaches the dermis for collagen work; 1927 nm is absorbed more superficially, where pigment and surface quality sit
- Directed at
- Skin tightening and lifting; pigmentation; inflammatory activity
- Facial areas
- Face, neck and the periorbital region
- Also applied in stretch mark treatment. Body areas
- Any area on the body
- Skin types
- Assessed for every skin type; settings adjusted for darker phototypes
Laser Skin Rejuvenation Singapore — What to Look For
Common issues with poorly performed laser toning Singapore treatments include: PIH from aggressive Q-switched laser settings on darker skin tones, rebound pigmentation from melasma stimulated by inadequate protocols, and short-lived results from single-pass sessions that do not achieve sufficient dermal thermal dose. FSX is planned around these pitfalls, using thulium energy and erbium glass energy at settings chosen for the skin type, including Fitzpatrick V and VI.
Dr Sin Yong assesses Fitzpatrick skin type at every session and adjusts energy parameters accordingly. Melasma is managed with a specific sub-ablative protocol rather than aggressive passes that worsen the condition. For patients seeking genuine skin rejuvenation in Singapore, FSX is planned as a course directed at skin texture, tone and tightness — not a single-visit brightening effect. All FSX sessions are performed personally by Dr Sin Yong — not by therapists or nurses.
MSc Practical Dermatology (University of Cardiff, UK) · MSc Aesthetic Medicine with Distinction (Queen Mary University of London)
Graduate Diploma in Sports Medicine (Nanyang Technological University)
FSX Laser also functions as a pigmentation treatment in Singapore, brightening uneven tone while refining pores and improving overall skin clarity.
Dr Sin Yong explains
“Nothing shrinks a pore. Less visible is achievable. Smaller is not.”Dr Sin Yong
Nothing Shrinks a Pore
Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 5 October 2026 · Editorial policy
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Every session personally performed by Dr Sin Yong · Orchard Road, Singapore · recovery discussed at consultation
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- 3Options explained, including no treatment
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