What FSX is
FSX is Dr Sin Yong's own non-ablative fractional laser protocol, and he performs every session himself.
Two wavelengths work together. The 1540 nm erbium glass laser reaches the dermis in narrow columns, leaving skin between them intact. The 1927 nm thulium laser works more superficially, on pigment and surface texture.
How FSX laser sessions in Singapore work
What it may address
| Concern | Note |
|---|---|
| Mild upper-eyelid laxity | A non-surgical option for lax lid skin. Results vary. True ptosis is referred on |
| Fine wrinkles | Around the eyes, mouth and cheeks |
| Active acne inflammation | Alongside medical treatment where needed |
| Post-acne redness | Reviewed over a planned course |
| Superficial scars | Acne scars, surgical marks and stretch lines |
| Early to moderate laxity | Face, jowls and neck |
| Pigmentation | Assessed first. Melasma uses separate, more conservative settings |
| Enlarged pores | Aimed at how visible they look, not their size |
| Body areas | Including stretch marks |
FSX compared with related lasers
| Treatment | What it is | How it differs |
|---|---|---|
| FSX Laser | Non-ablative fractional 1540 nm and 1927 nm | Multi-pass and multi-target, and non-ablative |
| S3 Resurfacing Lift | Fractional CO2 on the DEKA Tetra Pro | Reaches deeper, with more downtime and darker areas while healing |
| Laser toning | Single-pass toning | FSX is not single-pass toning |
| VF Lift | Monopolar radiofrequency | Used where a descended brow needs lifting |
Who it may suit
FSX tends to suit fine lines, enlarged pores, uneven texture, superficial scars, post-acne redness, early laxity, lax upper-lid skin and assessed pigmentation. Settings are planned zone by zone, so one session can treat different concerns in different places. Active acne, melasma and pigment may need a different plan or something else first. Suitability, recovery and the choice between FSX and other options are decided at examination. If you are looking for a CO2 laser, ask which depth of treatment your skin needs, because FSX and CO2 are different treatments. Please bring your questions about depth, not only about brand names. A multi-pass session is built around what your skin needs on the day. If several concerns sit together, such as fine lines, redness and pores, FSX can be planned to address them in one visit, zone by zone. Where one deep concern dominates, another route may fit better.
Who should wait or discuss it first
Pregnancy or breastfeeding, sunburnt or freshly tanned skin, active infection such as cold sores or impetigo, and current or recent isotretinoin.
Cold sore history, as antiviral cover may be advised. Photosensitising medicines, light-sensitive conditions such as lupus, and melasma. Timing or settings may change.
Keloid tendency, active vitiligo, and poorly controlled diabetes or other causes of slow healing.
Deep ice-pick, boxcar or rolling scars go to the S3 Resurfacing Lift or subcision. Heavy upper-eyelid or neck skin excess, true ptosis and lost volume also need other routes.
What it cannot do
FSX is not an ablative laser, and it is not single-pass toning. It does not lift a descended brow. It does not replace lost volume or raise descended tissue. It does not shrink pores, though they may look less visible. It cannot treat deep ice-pick, boxcar or rolling scars. Heavy skin excess and true ptosis of the eyelid are beyond its reach. If your concern is one of these, read about droopy eyelids or 4D scar planning. No result can be promised, and the course depends on your skin. It is also worth knowing what FSX is not meant to be. It is a skin-quality laser, and it works on the surface and dermis. If tissue has dropped or volume has gone, laser will not put it back.
Risks and side effects
Redness, warmth, mild swelling and sometimes fine scabbing, which should shed naturally.
Acne-like breakouts, cold sore outbreaks, lingering redness and temporary darkening.
Darkening after non-ablative fractional laser is more frequent in darker skin.
Skin-type assessment at each session, matched settings, antiviral cover where indicated, gentle skincare and strict sun protection.
Lingering redness, breakouts or darkening are reviewed, and settings are adjusted. See complication care.
Preparing for your session
Declare isotretinoin, photosensitising medicines and recent lasers or peels. Mention pregnancy, breastfeeding, cold sores and keloid history. Avoid sun and tanning, and pause retinoids, acids or exfoliants if advised. Bring skin photographs, a list of your products and past laser records. On the day, numbing cream is applied for comfort. If you have had cold sores, antiviral cover may be advised, so please raise this ahead of time.
Recovery, in phases
Redness, warmth and mild swelling. Skin may feel tight.
Gentle skincare only. A cool compress may help. Make-up is usually possible once the skin is calm.
Redness usually settles on its own. Fine scabs may form after higher-intensity passes.
Any collagen remodelling develops gradually, and post-acne redness is reviewed over a planned course. Sun protection continues.
Any lingering redness, breakouts or darkening is reviewed, and settings are changed for the next visit. Duration depends on settings, area and you.
How the fee is set
No price is stated. The fee depends on the areas treated, the concerns addressed, the number of passes and zones, consumables, and whether FSX is combined with another treatment. A written quote follows assessment, and the consultation also decides whether treatment is advised at all. Read how we quote. FSX may also be paired with R2 Glow Laser in the same session, if your plan calls for it.