What are pigmentation and hyperpigmentation?
Pigmentation is the colour that melanin gives your skin. Melanin is made by melanocytes, pigment cells in the upper skin. Hyperpigmentation means an area holds more melanin than the skin around it, or holds it deeper. The word describes what you see, not the cause.
Melasma, sun spots, freckles, post-inflammatory marks and Hori's naevus are all forms of hyperpigmentation, and many faces carry more than one. In marks left by inflammation, brown usually means pigment near the surface, while grey or slate suggests pigment that has dropped into the dermis, where it tends to last longer.
What causes pigmentation, and who is more at risk?
Five common triggers are listed below, and the trigger decides whether a laser can help. Darker skin is more at risk of marks after inflammation: a review found post-inflammatory hyperpigmentation affects darker-skinned patients more often and more severely [5].
| Trigger | What it does | Pigment linked to it |
|---|---|---|
| Sun | Ultraviolet light, and visible light in darker skin, prompts more melanin | Sun spots, darker freckles, melasma |
| Inflammation | Acne, eczema, bites, burns or an over-strong treatment can leave pigment behind | Post-inflammatory marks |
| Hormones | Pregnancy, hormonal contraception and other hormonal change | Melasma |
| Family tendency | Some pigment patterns run in families and are more common in Asian skin | Freckles, Hori's naevus, darkening after injury |
| Medicines | Some medicines can cause or deepen pigment | Varies, so every medicine is listed at the visit |
Why one laser does not fit every brown mark
Pigment sits at different depths and has different causes. A freckle, a Hori's naevus and a melasma patch can look similar in a mirror, yet a setting that helps one can worsen another. So the first step is an examination, not a device.
Dr Sin Yong looks at the pattern, depth and spread of the pigment, with magnification where a lesion needs it. A dermatoscope is used where brown marks could be confused. Only then is a plan set, and that plan can be no laser at all.
Pigmentation removal in Singapore: which treatment suits which type?
| Pigment type | Where it sits | Usual method | Note |
|---|---|---|---|
| Melasma | Treated as a long-term condition | Sun protection and medical treatment first. Laser, if any, begins with R2 Glow alone | Managed, not removed. It can rebound after heat or aggressive settings |
| Freckles | Upper skin (epidermis) | Picosecond or nanosecond pulses on the DEKA TORO | They run in families and can return |
| Sun spots (solar lentigines) | Upper skin (epidermis) | 785 nm picosecond, with 532 nm nanosecond for the most superficial spots | They can return without sun protection |
| Age spots that are raised (seborrhoeic keratosis, or age wart) | A surface plaque, not a pigment deposit | CO2 laser, radiofrequency or shave after examination | Laser pulses that fragment pigment do nothing to it |
| Hori's naevus | Dermis | 1064 nm in staged, conservative visits | Creams and 532 nm do not reach dermal pigment |
| Post-inflammatory marks | Follows inflammation | Treat the inflammation first, then gentle toning or R2 Glow | Active inflammation keeps producing pigment |
| Pigmented mole | Varies | Dermatoscope first, then mole assessment | Atypical moles are excised for histology, not lasered |
Melasma, freckles and Hori's naevus are not the same problem
Melasma is managed, not removed. Sun protection and medical care come first, and a laser is only an add-on. Read the melasma guide for the wider plan. Creams that may be used include supervised hydroquinone with breaks, azelaic acid, cysteamine and retinoids. Oral tranexamic acid needs clotting-risk screening and does not suit everyone. Freckles sit in the upper skin and are treated with short laser pulses, but they tend to run in families and can come back. Hori's naevus sits deeper in the dermis, so it needs 1064 nm and spaced, conservative visits. Creams will not reach it.
Freckle removal in Singapore: what is planned
Freckle removal starts by confirming that each spot is a freckle, not a sun spot, melasma or Hori's naevus. True freckles are small, flat and inherited, and sun darkens them. Short laser pulses on the DEKA TORO are aimed at the existing spots, usually at 532 nm, with 785 nm picosecond where freckles are denser or the skin is darker. Darkening after laser is the main risk in Asian skin, so settings follow your skin type. The tendency to freckle stays, so new spots can appear wherever sun reaches, and daily sun protection is part of the plan. Pico laser for freckles covers the detail.
What about naevus of Ota?
Naevus of Ota is a slate-grey or blue-brown birthmark, usually on one side of the face. Its pigment sits in the dermis, so creams do not reach it, and it can look like Hori's naevus, which appears in adulthood on both cheekbones. Whether it is treated here is confirmed after examination. Where the white of the eye is involved, an eye examination comes first.
Age spot removal and sun spots
Age spot is an everyday phrase, not a diagnosis. It may describe a flat sun spot, which is pigment. It may also describe a raised seborrhoeic keratosis, sometimes called an age wart, which is a plaque of surface cells. This difference matters for age spot removal. A laser can fragment pigment in a sun spot, but it cannot fragment a keratin plaque. That lesion has to be lifted off physically with a CO2 laser, radiofrequency or a shave. A keratosis that does not look typical may be excised for histology or referred.
How does a pigment laser work?
A pigment laser sends light at a wavelength that melanin absorbs, in a pulse short enough to keep most of the energy in the pigment. That principle, selective photothermolysis, was set out in a 1983 experimental study [6]. Nanosecond pulses rely more on heat. Picosecond pulses are far shorter, so pigment breaks apart mainly through pressure.
Wavelength sets depth. 532 nm stays near the surface, 1064 nm travels deeper and is absorbed less by surface melanin, and 785 nm sits between them. A 2021 meta-analysis of eight small studies in 200 Asian patients found similar responses across 532, 755 and 1064 nm picosecond lasers at three months; most of those studies had no control group, and it did not include 785 nm or the DEKA TORO [7]. The pigment and your skin type decide the choice.
Which laser is used for which pigmentation?
On the DEKA TORO, with 785 nm picosecond pulses and 532 nm and 1064 nm nanosecond emissions chosen by depth. See the pico laser page.
Long-pulsed 755 nm alexandrite and 1064 nm Nd:YAG. It is non-ablative and aimed at inflammation and uneven tone.
R2 Glow and T2 Frax Radiance combined, where a plan calls for both.
Low-energy 1064 nm passes. See laser toning.
532 nm for pigment in the epidermis, 755 nm for epidermal or dermal pigment, and 1064 nm for dermal pigment.
Which creams are used for pigmentation?
Creams act on melanin being made in the upper skin. With sun protection, they have a central role in melasma and post-inflammatory marks, and a review of post-inflammatory hyperpigmentation in darker skin placed lightening creams and sun protection first [5]. They do not reach dermal pigment such as Hori's naevus, and prescription creams are supervised. Hydroquinone, tretinoin and oral tranexamic acid are usually avoided in pregnancy or while breastfeeding.
| Cream | How it is used | Points to know |
|---|---|---|
| Hydroquinone | Prescription only, in supervised courses with planned breaks | Long unsupervised use can cause a blue-grey darkening |
| Azelaic acid | An alternative, or for maintenance | Often chosen for sensitive skin |
| Cysteamine | An alternative or maintenance option | A non-hydroquinone choice |
| Retinoids | Used to speed the turnover of pigmented surface cells | Paused around some laser treatments |
| Tranexamic acid | A topical cream, or a prescription tablet for melasma | Tablets only after screening for clotting risk |
| Sunscreen | Broad-spectrum, every day, tinted where melasma is present | Part of every plan |
What about chemical peels, IPL and microdermabrasion?
Standalone peels, IPL and microdermabrasion are not part of the pigment plans described here. They are listed so you can compare how each one works.
| Method | What it does | Limit for pigment |
|---|---|---|
| Chemical peel | Acid takes off surface layers, and the agent and its strength set the depth | Deeper peels carry more risk of darkening in Asian skin |
| IPL | A flash lamp with a broad band of light, not a laser | It heats melanin and blood vessels together, which narrows the margin in darker skin |
| Microdermabrasion | Abrades the surface layer | Works at or near the surface only |
| Pigment laser | A chosen wavelength aimed at melanin, through a largely intact surface | Settings must suit the skin type |
Can home products or facials remove pigmentation?
Not the deeper kinds. Facials, scrubs and home peels work at the surface, while the cells making pigment sit below. Friction can deepen melasma, and lemon juice or strong peels bought online can irritate Asian skin and leave darker marks.
Lightening creams from unregulated sources carry a separate risk. The Health Sciences Authority has warned about products found to contain mercury or undeclared hydroquinone. Bring any cream you use to your consultation, so that the label can be read.
How does skin type change the plan?
Most patients in Singapore are Fitzpatrick III to V, and skin type shapes every setting. In types II and III, 532 nm can be used for superficial spots. In type IV, longer wavelengths and lower fluence are used, and treatment is staged. In type V, 1064 nm and picosecond delivery are favoured, with test areas and more space between visits. It suits people with a confirmed diagnosis who will use sunscreen daily and who accept that maintenance is part of the plan.
Is laser pigmentation removal worth it?
It depends on the pigment and on you, so the answer here is by suitability, not outcome. Results vary.
| Factor | Tends to suit | A poorer fit |
|---|---|---|
| The pigment | A confirmed sun spot, freckle or settled post-inflammatory mark | A hope that melasma will be removed, or pigment still being produced |
| Your skin | Untanned skin, with settings chosen for its type | A recent tan, or active acne, eczema or infection |
| Your routine | Daily sun protection and planned reviews | Strong sun exposure that cannot be reduced |
| Your aim | Targeting existing marks, with maintenance accepted | One final session, or a change in natural skin colour |
Who should wait or choose another path
Elective laser is generally postponed.
Treatment is deferred until the skin has settled.
Acne, eczema or infection is treated first.
Photosensitising medicines or a keloid tendency change the timing or the plan.
A mark that bleeds, changes or looks atypical is examined or excised, not lasered.
Maintenance is part of care, so this is a poor fit if you want one final session.
Can pigmentation be removed for good?
It can be managed, but it is not taken away.
Pigment driven by inflammation, friction or medicines keeps forming until the cause is addressed.
It is a surface plaque rather than a pigment deposit.
Unclear lesions need examination first.
Sun spots, freckles and melasma can all recur.
How Dr Sin Yong approaches pigmentation removal
Dr Sin Yong identifies the pigment in person before choosing any instrument. Melanin near the surface, melanin in the dermis, pigment still being made by inflamed skin and a brown plaque of keratin each need a different answer.
Pattern, depth and spread, with magnification where a mark needs it. The one spot that looks unlike the rest is checked before any laser.
Your skin type, any darkening after past procedures and your current sun exposure. These set the wavelength and energy.
R2 Glow is aimed at inflammation that keeps making pigment. T2 Frax Radiance is aimed at pigment already laid down.
Melasma treated like a sun spot, pigment that is still being produced, and any mark that needs a diagnosis, which is excised for histology or referred.
In Fitzpatrick IV and V skin, longer wavelengths, picosecond pulses and lower energy, with spaced visits. Each response is reviewed before a repeat is planned.
“So I name the pigment before I name the laser.”
Risks and side effects
Post-inflammatory darkening is the main cosmetic risk in Fitzpatrick III to V skin. Melasma can rebound after heat or aggressive settings. Over-aggressive treatment can leave pigment darker than it was, so any worsening is reassessed. Darkening is managed with gentle toning and topical treatment. Test patches are used where appropriate, and eyes are protected during laser. Report lasting redness or later darkening to the clinic.
Is pigmentation removal painful?
Most people describe a pigment laser as a rapid snapping feeling with some warmth. How much you feel depends on the area, the mode and the energy, and toning tends to be gentler than spot treatment. Topical anaesthetic is used where needed, and you can ask to pause. Creams can sting, redden or peel the skin, and the plan is adjusted if they do.
What recovery looks like
How can pigmentation be prevented?
Prevention rests on sun protection, calm skin and early checks, and it aims to limit new pigment from triggers you control. A 2023 narrative review, with authors employed by a manufacturer and no pooled data, suggested broad-spectrum, high-SPF sunscreen that also covers UVA1 and visible light for skin of colour [8].
| Area | Do | Avoid |
|---|---|---|
| Sun | Broad-spectrum sunscreen every day, reapplied outdoors, with a hat and shade | Tanning, and skipping sunscreen on cloudy or hazy days |
| Melasma | A tinted sunscreen with iron oxides, and keeping cool | Saunas, hot yoga and long workouts in the heat |
| Spots and rashes | Treating acne or eczema early | Picking, squeezing and scrubbing |
| New marks | A check for any spot that is new, changing or unlike the rest | Lasering or bleaching a mark nobody has diagnosed |
How many sessions does pigmentation removal take?
There is no fixed number of sessions. Visits are staged and spaced, and the plan follows the response at each review. Fees depend on the pigment type, the instrument, the area, your skin type, any creams or medicines, and review. A per-session figure means little on its own, so fees are set out in writing after assessment, and that plan includes the option of no laser.
How much does pigmentation removal cost in Singapore?
The fee is given after assessment, because the diagnosis decides the instrument, the staging and whether a laser is used at all. No figure is published, and a number given before examination would not describe your skin. The written plan can include no laser.
| What affects the fee | Why |
|---|---|
| The pigment type | Each type has its own plan, and some start without a laser |
| The instrument | T2 Frax Radiance, R2 Glow, both together as R2T2, or physical removal of a raised lesion |
| The area | A few spots differ from tone across the whole face |
| Your skin type | Darker skin is treated in stages, with test areas where needed |
| Creams and medicines | Any topical or oral treatment in the plan |
| Review | Further steps are decided at review, not sold in advance |