Medically reviewed by Dr Sin Yong · Last reviewed · 8 min read
Published 7 October 2026 · Reviewed by Dr Sin Yong
Pico laser cannot control melasma, release a tethered or deep scar, shrink a pore, tighten loose skin or treat wrinkles. A picosecond laser fragments pigment that is already in the skin and, in fractional mode, remodels surface texture. Each of the other problems has a different cause and is assessed for a different tool.
No. Pico laser acts on pigment that has already been deposited; melasma keeps making pigment because its drivers, hormones, visible and ultraviolet light, vascular factors and heat, are untouched by any laser. A sun spot treated well tends not to return; melasma treated as if it were a sun spot tends to rebound, often darker, because the heat of treatment is itself a trigger. That is why the pico laser page lists melasma under what the technology does not treat.
What is used instead is a plan rather than a device. Melasma treatment starts with diagnosis and depth, then photoprotection against visible light as well as ultraviolet, topical therapy, heat avoidance and, where the examination supports it, conservative low-fluence laser as an adjunct with a stopping point. Dr Sin Yong says plainly at consultation that melasma is managed rather than removed, and a clinic promising removal is describing a different condition.
Only the surface part, and only in fractional mode. The fractional setting on the T2 Frax Radiance protocol uses a diffractive optic to create small zones of tissue breakdown with intact skin between them, which prompts dermal remodelling and can soften fine surface irregularity. It does not release a rolling scar that is tethered from below, and it does not reach the base of a deep boxcar or an ice-pick scar.
Acne scar treatment is planned by scar type for that reason. Tethered scars are released by subcision; broad boxcar scars are resurfaced with the fractional CO2 S3 Resurfacing Lift or treated with RF microneedling; ice-pick scars are approached with TCA CROSS or point treatment. A face that has had several rounds of pico laser for scarring, with the same depressions remaining, usually has scars that were never a pigment or surface problem. The flat brown marks acne leaves behind are pigment, and those are a pico or toning question once the skin is calm.
“A pico laser breaks up pigment that is already there. It does nothing about the reason your skin made it — which is why melasma comes back and a sun spot usually does not.”
Dr Sin YongOn what the technology does and does not reach
No. A pore is an opening around a hair follicle and oil gland, and nothing shrinks one. What fractional pico treatment can do is prompt remodelling of the collagen around the pore so that its edges read firmer and its shadow softens; response varies, and the phrase pore tightening promises more than the physics allows. The pore reduction page explains what each tool does to the appearance of pores and what none of them does.
Where enlarged pores come with oiliness, inflammatory acne or background redness, the 675 nm 少女光 Laser and RF microneedling are the tools more often considered, because they act in the dermis around the pore rather than on surface pigment. Which applies is decided by examining what is driving the pore's appearance, not by asking for a laser by name.
| Concern | Why pico laser is not the answer | What is assessed instead |
|---|---|---|
| Melasma | Drivers continue and heat can darken it; pigment returns | Diagnosis, photoprotection, topical therapy, conservative adjuncts |
| Tethered rolling scars | A tether beneath the dermis is not released from above | Subcision, then resurfacing or RF microneedling |
| Deep boxcar and ice-pick scars | Fractional pico does not reach the base | Fractional CO2 S3 Resurfacing Lift; TCA CROSS |
| Enlarged pores | A pore is a structure; nothing shrinks it | Remodelling around the pore: 675 nm laser, RF microneedling |
| Loose skin and jowls | Picosecond pulses leave too little heat to contract collagen | HIFU, VF Lift – Vertical Facelift, Time Freeze Laser LCLR® |
| Wrinkles | Movement lines are muscle; etched lines are dermal | Botulinum toxin; dermal remodelling; filler or lifting for folds |
No. A picosecond pulse is designed to deliver energy too briefly for heat to spread, which is exactly why it suits pigment in darker skin and exactly why it is the wrong tool for laxity. Tightening needs controlled heat held in the dermis or placed at the SMAS so that collagen contracts and remodels; a pico laser does not do that, and fractional pico passes marketed as lifting are doing surface remodelling at most.
Laxity is assessed for the mechanisms built for it: focused ultrasound on the Ultraformer MPT or Ultherapy Prime for the SMAS, monopolar radiofrequency through the VF Lift – Vertical Facelift on Volnewmer for the dermis and subdermal network, and the Time Freeze Laser LCLR® protocol where laser lifting is indicated. Heavy skin excess is beyond all of them and is referred to a plastic surgery specialist.
No. Lines made by movement, in the forehead, between the brows and at the eyes, belong to muscle and answer to botulinum toxin. Lines etched into the dermis at rest need dermal remodelling, through fractional CO2 resurfacing, RF microneedling or biostimulation, and folds that come from volume loss and descent are a filler or lifting question. A pico laser can even out the tone around a line and, in fractional mode, soften fine crepiness; it does not remove a wrinkle.
Asking for pico laser by name is reasonable; most people have been told it is the gentle laser for Asian skin, which for pigment is a fair description. What it is being asked to do is the part worth checking. Dr Sin Yong identifies the problem first, says plainly when pico is not the tool, and sets the fee out in writing after the consultation; how fees are quoted explains what that document contains.
Because conservative low-fluence pico or toning can be one adjunct within a melasma plan, lightening what is present while photoprotection and topical therapy address the drivers. The problem is laser offered as the plan, or at energies that heat the skin, which is how melasma rebounds.
Discrete sun spots and freckles are the clearest match for a picosecond laser, usually at 532 nm, because they are deposits rather than an active process. New ones form with sun exposure, so protection continues. A mark that is changing or irregular is examined before any laser.
No. Fractional pico creates small zones of breakdown beneath an intact surface with little heat; fractional CO2 ablates columns of skin and heats the dermis around them. CO2 reaches deeper and remodels scars pico cannot; it also brings crusting and a recovery that needs care.
No. Red marks are blood in dilated capillaries, and a picosecond pulse does not hold heat in a vessel wall long enough to close it. Red marks are assessed for vessel-directed or inflammation-directed treatment; brown marks are the pigment question.
Picosecond laser. DermNet, 2024. source
Melasma (facial pigmentation). DermNet, 2024. source
Picosecond lasers in cosmetic dermatology: where are we now? An overview of types and indications. Lasers in Medical Science (Springer), 2023. source
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