Dark spots, uneven patches, and persistent pigmentation are among the most common skin concerns for people living in Singapore. Sun exposure, hormonal shifts, inflammation from acne — any of these can trigger your skin to overproduce melanin, the pigment responsible for your skin’s colour. When that excess melanin concentrates unevenly, it shows up as sunspots, melasma, post-inflammatory marks, or freckles that many people find difficult to fade on their own.
Pico laser has become one of the most established options for addressing these concerns. At Sozo Aesthetic Clinic, Dr Justin Boey, Medical Director, uses the Lutronic PicoPlus laser — a device Sozo was among the earliest providers of in Singapore — to treat a range of pigmentation types with precision and minimal downtime. Unlike older nanosecond lasers that rely heavily on heat, the PicoPlus delivers energy in picosecond pulses (trillionths of a second), shattering pigment particles mechanically rather than thermally. That distinction matters: less heat means less risk of collateral skin damage, making the treatment better suited to Singapore’s ethnically diverse population and the varied pigmentation concerns that come with it.
That said, pico laser is not a one-size-fits-all fix. Not all pigmentation responds the same way, and some types — particularly melasma — require a multi-modal approach rather than laser alone. Understanding what you’re dealing with before committing to treatment is the difference between a lasting result and wasted sessions. This page covers the main pigmentation types pico laser can treat, how the technology works, what results to expect, and what it costs at Sozo Clinic.
If you want to explore the full range of pico laser treatments at Sozo, start there first.
Types of Pigmentation Pico Laser Can Treat
Pico laser’s effectiveness depends heavily on the type of skin pigmentation you have. Some are superficial and clear quickly. Others are deeper, hormonally driven, or reactive — and those require more caution and a longer treatment plan. Here is a breakdown of the five main types treated at Sozo Clinic.
| Pigmentation Type | Primary Cause | Responds Well to Pico? | Recurrence Risk |
|---|---|---|---|
| Sunspots (Solar Lentigines) | UV exposure, cumulative sun damage | Yes — typically 1–3 sessions | Low |
| Melasma | Hormonal triggers, UV exposure | Partially — needs multi-modal approach | High |
| PIH (Post-Inflammatory Hyperpigmentation) | Acne, eczema, skin trauma | Yes, with cautious settings | Low–Moderate |
| Freckles (Ephelides) | Genetics, UV exposure | Yes — often responds quickly | Low, may recur with sun |
| Birthmarks (select types) | Congenital melanin deposits | Selective — requires assessment | Variable |
Sunspots (Solar Lentigines)
Sunspots are flat, darkened patches that develop from years of accumulated UV exposure. They tend to appear on the face, hands, and décolletage, and are among the easiest pigmentation types for pico laser to address. Because they sit in the upper layers of the skin and are caused by a localised concentration of melanin rather than a systemic factor, the laser can target them directly.
Most people see significant lightening after one to three sessions. The treated spots will typically darken briefly before flaking off over the following days — a normal and expected part of the process. Consistent sun protection after treatment is essential to prevent new spots from forming.
Melasma
Melasma is one of the more challenging pigmentation conditions to treat. It is triggered by a combination of hormonal activity and UV exposure, which means it sits deeper in the skin and has a strong tendency to recur. It appears as symmetrical brown or greyish patches, typically across the cheeks, forehead, and upper lip, and is particularly common in women during pregnancy or while on hormonal contraceptives.
Pico laser can reduce the appearance of melasma, but it is rarely sufficient on its own. At Sozo Clinic, Dr Boey typically combines laser with topical agents and strict photoprotection for a more durable outcome. Patients should expect gradual improvement across multiple sessions rather than a dramatic single-treatment result. For a detailed guide on managing melasma, including what works and what doesn’t, see Sozo’s dedicated resource.
PIH (Post-Inflammatory Hyperpigmentation)
PIH is the dark discolouration that forms after skin inflammation — a breakout, an eczema flare, or any kind of trauma to the skin. It is post-inflammatory hyperpigmentation — not a pigmentation disorder in itself, but a skin response. It tends to affect darker skin tones more severely, as melanin production ramps up in response to irritation.
Pico laser can help fade PIH, but it must be applied with lower energy settings to avoid triggering further inflammation — which would worsen the very marks you’re trying to clear. Treatment intervals are typically spread out, and the approach is deliberately conservative. Patience matters more here than intensity.
Freckles (Ephelides)
Freckles are genetically influenced, small, and tend to darken with sun exposure and fade in winter. They sit in the most superficial layer of the skin, which makes them one of the most straightforward pigmentation types for pico laser to target. Results are often visible after just one or two sessions.
Because freckles are partly genetic, complete elimination is not always possible — and they may gradually return with ongoing sun exposure. Treating freckles is most effective when paired with a consistent SPF routine to slow their recurrence.
Birthmarks (Select Types)
Not all birthmarks are suitable for laser treatment, and pico laser is not the right tool for every type. Café-au-lait spots and certain superficial pigmented birthmarks may respond to pico laser, but the outcome is variable and highly dependent on the depth and character of the pigmentation. Some birthmarks involve dermal pigment that sits too deep for the laser to reach effectively.
An in-person assessment is essential before any decision about treating a birthmark. Dr Boey will evaluate whether laser is appropriate, and what results are realistically achievable, before recommending a course of action.
Doctor’s Note:
“Not all pigmentation is the same, and treating it without a proper diagnosis is one of the most common mistakes I see. Melasma and sunspots can look similar to the untrained eye, but they respond to treatment in completely different ways. Before we recommend any laser, we spend time identifying exactly what type of pigmentation we are dealing with, because the wrong approach can make things worse, not better.”
— Dr Justin Boey, Medical Director, Sozo Aesthetic Clinic
How Pico Laser Targets Pigmentation
Understanding the mechanism behind pico laser helps explain why it performs differently from older laser technologies — and why that difference matters for pigmentation in particular.
Photoacoustic vs Photothermal Mechanism
Older lasers (Q-switched, nanosecond) work primarily through a photothermal mechanism: they heat the target pigment until it breaks apart. This is effective, but the heat generated can spread to surrounding tissue, increasing the risk of post-treatment redness, scarring, and — particularly in darker skin tones — post-inflammatory hyperpigmentation.
Pico laser operates through a photoacoustic mechanism. By delivering energy in picosecond bursts (one trillionth of a second), the laser creates a rapid pressure wave that shatters pigment particles into microscopic fragments — without generating the same level of heat. Those fragments are then cleared naturally by the body’s immune system. The result is more precise targeting with significantly less thermal collateral damage.
Pico Laser vs Q-Switched Laser for Pigmentation
| Feature | Pico Laser (PicoPlus) | Q-Switched (Nd:YAG) |
|---|---|---|
| Pulse duration | Picoseconds (trillionths of a second) | Nanoseconds (billionths of a second) |
| Primary mechanism | Photoacoustic (pressure-based) | Photothermal (heat-based) |
| Thermal damage risk | Lower | Higher |
| Suitability for darker skin tones | Better, with less PIH risk | Higher caution required |
| Downtime | Minimal, usually hours to 1–2 days | Moderate, varies by setting |
| Pigmentation depth | Superficial to mid-dermal | Superficial to mid-dermal |
| Best for | Melasma, PIH, sunspots, freckles | Sunspots, tattoo removal, some pigmentation |
The Lutronic PicoPlus used at Sozo Clinic offers multiple wavelengths, which allows treatment to be adjusted based on the pigmentation type and skin tone:
- 1064 nm — the preferred wavelength for darker skin tones and deeper pigmentation such as PIH and deeper melasma. It carries a lower risk of triggering further melanin production.
- 532 nm — targets superficial pigmentation such as freckles and sunspots. More effective on lighter skin; used cautiously in medium to dark skin tones.
- 755 nm — less commonly used in Asian skin due to the risk of overstimulating melanin in darker skin types.
Doctor’s Note:
“What makes the PicoPlus effective for pigmentation in Asian skin is the combination of pulse speed and wavelength flexibility. Because we can adjust between 532 nm, 1064 nm, and 755 nm, we can match the treatment to the depth and type of pigment rather than using a fixed setting on every patient. That precision is what reduces the risk of post-inflammatory hyperpigmentation, which is a real concern in skin tones with higher melanin density.”
— Dr Justin Boey, Medical Director, Sozo Aesthetic Clinic
Results: Before and After
As a registered medical clinic in Singapore, Sozo Clinic is unable to display before and after photographs of treatment results on this website, in line with Ministry of Health advertising guidelines. During a formal consultation, Dr Boey is available to discuss expected outcomes based on your specific pigmentation type and skin condition.
For a curated gallery of before and after results from pico laser treatments at Sozo, including outcomes for different skin concerns, visit the dedicated results page.
What you can generally expect, based on the type of pigmentation being treated:
- Sunspots and freckles: Visible lightening after one to two sessions. Treated spots typically darken for a few days before flaking off cleanly.
- PIH: Gradual and progressive fading across two to four sessions. Results depend heavily on how the skin is managed between treatments.
- Melasma: Improvement is possible but slower, and best measured at the one-month mark after the final session rather than immediately after each treatment. Recurrence is common without ongoing maintenance and sun protection.
- Freckles: Often respond within one session; longer-term results depend on consistent SPF use.
Pigmentation fades gradually over two to four weeks as the body clears the broken-down pigment. Most patients see their clearest improvement about four weeks after the final session, not immediately after treatment.
How Many Sessions for Pigmentation?
Session count is one of the most common questions, and the honest answer is: it depends on the type of pigmentation, the depth of the pigment, your skin tone, and how well you follow aftercare. The figures below are general estimates based on the conditions treated at Sozo Clinic — your actual treatment plan will be determined during a consultation.
Sessions by Pigmentation Type
| Pigmentation Type | Estimated Sessions | Typical Interval | Notes |
|---|---|---|---|
| Sunspots (Solar Lentigines) | 1–3 sessions | 4–6 weeks | Often respond quickly. Lighter spots may clear in a single session. |
| Melasma | 3–6+ sessions | 4–6 weeks | Requires a combination approach. Ongoing maintenance is commonly recommended. |
| PIH (Post-Inflammatory) | 2–4 sessions | 4–8 weeks | Gentler settings are often used, with longer intervals to monitor skin response. |
| Freckles | 1–3 sessions | 4–6 weeks | May recur seasonally with UV exposure. |
| Birthmarks (select) | Variable | Assessed case by case | Requires an in-person evaluation. Outcomes cannot be guaranteed. |
Maintenance Schedule
Pigmentation — particularly melasma and freckles — can recur, especially with ongoing sun exposure. Once initial treatment goals are achieved, Dr Boey may recommend periodic maintenance sessions to keep pigmentation from returning. The frequency varies by individual, but many patients benefit from one to two maintenance sessions per year alongside a consistent skincare and photoprotection routine.
Maintenance is not about chasing perfection after every session. It’s about managing a skin condition that has an underlying cause — hormonal fluctuation, genetics, or sun exposure — that does not disappear after treatment. The laser addresses the existing pigment; the lifestyle and skincare routine keeps new pigment from forming.
Cost of Pico Laser Pigmentation Treatment in Singapore
The cost of pico laser for pigmentation at Sozo Clinic depends on the area being treated, the number of passes required, and the specific pigmentation condition. Pricing is assessed individually during consultation — there is no fixed per-session rate because treatment is not standardised.
| Treatment | Starting Price | Best For |
|---|---|---|
| PicoPlus Laser | From $150 | Pigmentation, pores, mild acne marks |
| Ruvy Touch | From $350 | Skin texture, pigmentation enhancement |
| Pro Yellow Laser | From $180 | Pigmentation, redness, vascular concerns |
| Chemical Peels | From $180 | Surface pigmentation, mild melasma support |
Prices shown are starting prices. The actual cost per session depends on the extent of pigmentation and the area treated. A treatment plan for melasma across multiple areas will differ significantly from a single-session sunspot treatment. Dr Boey will provide a clear quote during your initial assessment.
Note: All medical treatments at Sozo Clinic are subject to individual assessment. Prices and treatment availability are subject to change.
Is Pico Laser Right for Your Pigmentation?
Pico laser is a strong option for many pigmentation concerns — but not for all of them, and not for everyone. Here is a straightforward look at who is likely to benefit and who should consider alternatives or additional support.
You are likely a good candidate if:
- You have sunspots, freckles, or surface pigmentation that has not faded with topical treatments alone
- You have PIH from past acne and your active breakouts are under control
- You have melasma and are willing to commit to a multi-session plan with strict sun avoidance
- Your skin is stable, not currently sunburnt, and you are not pregnant or breastfeeding
Pico laser is not recommended if you:
- Are pregnant or breastfeeding
- Have active sunburn, open wounds, or an active skin infection in the treatment area
- Are on medications that increase photosensitivity (discuss with Dr Boey before booking)
- Have a photosensitive skin condition that is incompatible with laser treatment
For some pigmentation types — particularly Hori’s naevus or very deep dermal pigment — pico laser may not be sufficient on its own, and a different device or combination approach may produce better results.
The most reliable way to know whether pico laser is right for your pigmentation is a proper face-to-face assessment. Dr Boey will identify the type of pigmentation you have, assess your Fitzpatrick skin type and individual risk factors, and recommend a personalised treatment plan based on what is likely to work — not what is most convenient to offer.
Book a Pigmentation Consultation at Sozo Clinic
Dr Justin Boey and the team at Sozo Aesthetic Clinic see patients with all types of pigmentation concerns — from straightforward sunspot treatment to complex melasma management. Every consultation begins with a full skin assessment so the treatment plan is built around your specific condition, not a generic protocol. Sozo Clinic is located at 1 Raffles Place, #05-12/13, Singapore 048616, and is open Monday to Friday, 10am–8pm, and Saturday 10am–3pm.
Book a consultation: sozoclinic.sg/contact-us
WhatsApp Dr Boey’s team: 9610 5102
All treatment options: Explore the full pico laser treatment range
References
Clinical Studies
- Zhou Y, Hamblin MR, Wen X. An update on fractional picosecond laser treatment: histology and clinical applications. Lasers Med Sci. 2023;38(1):45. DOI: 10.1007/s10103-022-03704-y. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC9852188/
- Dong W, Wang N, Yuan X, Zhang W. Treatment of pigmentary disorders using picosecond laser in Asian patients: A meta-analysis and systematic review. Dermatol Ther. 2021;34(1):e14709. DOI: 10.1111/dth.14709. Available at: https://pubmed.ncbi.nlm.nih.gov/33368885/
- Mar K, Khalid B, Maazi M, Ahmed R, Wang OJE, Khosravi-Hafshejani T. Treatment of post-inflammatory hyperpigmentation in skin of colour: A systematic review. J Cutan Med Surg. 2024;28(5):473–480. DOI: 10.1177/12034754241265716. Available at: https://pmc.ncbi.nlm.nih.gov/articles/PMC11514325/
Official Guidelines
- Singapore Medical Council. Guidelines on Aesthetic Practices for Doctors. Singapore Medical Council; 2016. Available at: https://www.smc.gov.sg/for-professionals/regulations-guidelines-circulars/guidelines-on-aesthetic-practices-for-doctors/