Melasma, Sunspots, or Dullness: How Should Each Be Treated?

TL;DR: A face that looks uneven or dull is usually carrying more than one kind of pigment problem at once: melasma, solar lentigines, post-inflammatory marks, and a separate loss of clarity that isn’t pigment at all. Low-fluence 1064nm toning has real evidence behind it for melasma, but trials show its gains fading by six months, and the higher-energy settings used to clear sunspots carry a meaningfully higher rebound-pigment risk in Asian skin. We diagnose which layer each patch sits in before choosing an energy setting, and we build the schedule around how long a patient is actually staying in Seoul.

The outcome in pigment care depends on whether the patches on a patient’s face get split into categories before anyone reaches for a setting. I’m Dr. Kim Kyungsoo, director at our Seocho clinic. A large share of my consultations start the same way: a patient believes they have one problem, and the exam shows two or three overlapping ones. This piece walks through how we separate them, why the same person can get different laser settings on different visits, and what’s realistic inside a two-to-seven-day Seoul stay.

Four Things Hiding Under the Word “Dull”

Patients describe their concern as dullness or unevenness, but that description usually covers several distinct conditions.

Type	Typical depth	Clinical pattern	What the plan prioritizes
Melasma	Spans epidermis and dermis, often with dermal inflammation and vascular involvement	Blurred, symmetrical brown patches on both cheeks	Lowering activity and managing relapse over time
Solar lentigines (sunspots)	Usually epidermal	Well-defined, dot-like brown spots	Lesion-by-lesion treatment; the recovery window decides the outcome
Post-inflammatory hyperpigmentation (PIH)	Can involve epidermis, dermis, or both	Color left behind after acne, a procedure, or irritation	Sequencing that avoids adding more irritation
Tone loss without much pigment	Often not pigment-driven at all	Dulled by thickened keratin, redness, dryness, or texture that scatters light unevenly	Barrier and vascular care before any pigment device

The reason this split matters is practical: the settings that clear a sunspot fastest tend to aggravate melasma, and the low energy that keeps melasma quiet barely touches a sunspot. Trying to address both in one session usually means neither improves.

Why Low-Fluence Toning Works for Melasma, and Where That Evidence Stops

Low-fluence 1064nm Q-switched Nd:YAG treatment, commonly called laser toning, has the strongest evidence base of any laser approach to melasma. A 2026 systematic review and meta-analysis of randomized controlled trials published in Cureus ran a subgroup analysis by laser type and found that low-fluence QS Nd:YAG at 1064nm produced a statistically significant reduction in melasma severity (mean difference 1.47), while picosecond and fractional lasers did not significantly outperform control groups in the same pooled data.

Durability is the harder question. A 2025 split-face trial in Scientific Reports enrolled 28 melasma patients; 21 completed 5 to 10 sessions with follow-up through 12 months. The Melasma Area and Severity Index score dropped significantly at 1 and 3 months compared with baseline, but that significant difference did not hold at 6 or 12 months. The melanin index stayed lower through 12 months only on the side treated with the combined approach. In plain terms: toning suppresses the visible severity of melasma for a period measured in months, and what happens after that is decided largely by maintenance care and sun avoidance.

Shortening the interval between sessions creates a different problem. A 2019 report in the Journal of Clinical and Aesthetic Dermatology described 23 patients who received laser toning three times weekly for two months; every one of them developed bilateral mottled hypopigmentation, and the authors stated they no longer perform the treatment at intervals shorter than two weeks. Some patients ask us to schedule toning daily or several times a week during a short trip, and this is exactly why we don’t. Pigment loss, once it appears, is far harder to reverse than the pigment it was meant to treat.

This is also why we default to combination therapy for melasma rather than laser alone. A 2018 review in Dermatologic Surgery on Asian melasma patients found that low-dose oral tranexamic acid, around 500mg daily for 8 to 12 weeks, showed efficacy with generally mild side effects. Oral tranexamic acid needs a few boxes checked first: a history of clotting disorders, hormonal medication use, or pregnancy and breastfeeding can rule it out, so we confirm medical history in consultation before deciding.

The Rebound Risk When Clearing Sunspots

A well-defined solar lentigo sits in the epidermis, so a single high-energy pass often clears it visibly. The complication that follows is post-inflammatory hyperpigmentation.

A 2024 randomized controlled study in the Journal of Dermatological Treatment treated solar lentigines with 532nm Q-switched Nd:YAG and reported PIH in 55.3% of treated lesions, higher than the 20 to 50% range previously reported for similar treatment in Asian skin. The authors pointed to the relatively high fluence used in the study (2.3 ± 0.2 J/cm²) as a likely driver, and identified post-treatment erythema and daytime outdoor sun exposure as predictors of PIH developing.

Scheduling a strong lentigo treatment the day before a full day of outdoor sightseeing is the kind of decision that looks fine on the treatment table and shows up three or four weeks later as darker skin than before. It’s why we ask about the rest of a patient’s itinerary before setting the energy.

Once PIH has already appeared, the sequence changes again. A 2023 review in the American Journal of Clinical Dermatology on PIH in skin of color concluded that response is inconsistent and complication risk is real, so laser remains a second-line option after topical treatment rather than a first response. Reaching for another laser pass as soon as discoloration appears can reintroduce the irritation that caused it.

When Dullness Isn’t Pigment at All

A recurring consultation for us involves patients who’ve had several rounds of pigment treatment and still feel their skin looks dull. On exam, the melanin index is often unremarkable. What’s actually happening is a thickened stratum corneum scattering light unevenly, or visible surface vessels darkening the overall tone. Repeating pigment lasers on this group just adds irritation on top of irritation.

For this group, we reorder the plan instead of intensifying it. Barrier repair and hydration come first. Where relevant, we add treatments and skin-booster options that target texture and vascular tone. Pigment devices, if they’re used at all, start at the lowest setting only once the underlying tone has settled. Splitting a single face into separate visits (melasma on the cheekbones one session, sunspots on the forehead another, redness in between) has produced more stable results for us than trying to solve all three in one pass.

How We Build a Pigment Plan in Consultation

Our process at Seocho follows the same order for every pigment case.

1. Diagnosis. We confirm whether the pigment sits in the epidermis, includes a dermal component, and how much inflammation or vascular involvement is present. This determines how the case gets split across categories.
2. Design. We set goals by category and build the session count and spacing around how long the patient is staying and what aftercare is realistic once they’re home. We don’t build a plan that tries to do everything in one visit.
3. Treatment. The physician who diagnosed and designed the plan performs the procedure. I completed medical school at Seoul National University and hold both Korean and Japanese medical licensing, having previously practiced as a director at a Gangnam clinic. Continuity between diagnosis and treatment matters especially in pigment cases: adjusting the setting session to session requires having seen how the previous session actually responded.
4. Aftercare. What happens in the first few hours and the following days after treatment shows up directly in the pigment result.

Confirming medication history, prior procedures, and pregnancy or breastfeeding status is part of every pigment consultation, since these determine what settings and medications are even on the table.

Fitting Pigment Treatment Into a Short Seoul Visit

These are the guardrails we hold to when planning pigment care around a short stay.

• Diagnosis plus a first session is usually possible on the first visit. For melasma, we start at low fluence and observe the response; the interval to the next session is set around the patient’s schedule after returning home.
• Strong lentigo settings depend on what’s left on the itinerary. If daytime outdoor exposure is coming up, we either push the session later or lower the energy.
• We don’t schedule strong treatments right before a flight home. Scabbing and erythema combined with long-haul travel and cabin dryness make aftercare harder to manage.
• Recovery logistics get built into the schedule. Our clinic operates on-site within a hotel building, so a patient can go from the treatment room to their room without a separate trip, and the oxygen chamber and vitamin IV drip service are complimentary for hotel guests. Reducing sun exposure and transit time on treatment day connects directly to the PIH risk factors described above.

Timing for makeup after different procedure types is covered in our guide to when you can wear makeup after a skin procedure. If sending photos and history ahead of a visit is useful for planning, our breakdown of what a pre-trip video consult can and can’t establish covers that process.

What Determines the Result After You Go Home

Photoprotection is the step that gets skipped most often in pigment care. A systematic review in the Australasian Journal of Dermatology on PIH prevention in skin of color analyzed 369 cases, over 95% of them Asian patients and laser-triggered. Among the preventive measures studied, sunscreen was the one that consistently reduced the incidence of PIH; topical steroids and oral tranexamic acid produced less consistent results, and a cooling-air device was actually associated with worse outcomes.

The type of sun protection matters too. A 2014 double-blind randomized trial in Photodermatology, Photoimmunology & Photomedicine followed 68 melasma patients for 8 weeks, comparing an SPF 50+ UV-only sunscreen against one that also contained iron oxide to block visible light, with all patients also using 4% hydroquinone. The visible-light-blocking group showed greater pigment improvement. Helena Polena and colleagues extended this question in a 2025 study in the Journal of Cosmetic Dermatology, following 42 women with melasma through five months of summer and comparing relapse prevention between a tinted and an untinted sunscreen.

So when a patient is preparing to fly home, I lead with two instructions before the next-session schedule: use a sunscreen that accounts for visible light, applied generously every day, and avoid extended daytime outdoor exposure for the first few weeks after any pigment treatment. Both of the studies above point at the same conclusion.

FAQ

Can I continue laser toning at a clinic back home after starting here?

Yes, but bring the interval and setting information with you. The hypopigmentation cases described above were tied to repeating treatment too frequently, so we provide a record of the last session’s parameters and our recommended timing for the next one. A different machine elsewhere won’t use identical numbers, so what matters most is communicating the interval and the goal, not the exact setting.

Can I start melasma treatment while pregnant or breastfeeding?

Systemic medications like oral tranexamic acid are off the table during this period. What remains is photoprotection and gentle topical care with minimal irritation; whether laser is appropriate needs an individual judgment in consultation. Let us know at the time of booking so we can allocate the right amount of consultation time.

Can pigment treatment and a lifting procedure be done on the same day?

It depends on the combination and the condition of the skin. Overlapping a heat-based lifting treatment with pigment laser on the same day can prolong erythema, and post-treatment erythema is one of the reported predictors of subsequent pigmentation. The layer-by-layer differences between energy-based lifting devices are covered separately in our Ulthera versus Thermage comparison.

How many sessions until my pigmentation is gone for good?

Melasma doesn’t have a clean endpoint in that sense. The improvement windows shown in trials were generally measured in months, and some of those gains were not sustained afterward, so we plan an initial intensive phase followed by a separate maintenance phase rather than a fixed session count. Epidermal sunspots are more lesion-specific and can reach a real endpoint, where aftercare in the days following treatment matters more than the number of sessions.

Booking a Consultation

A single photo rarely settles which type of pigment is present. Tell us your Seoul travel dates and what’s bothering you now, and after diagnosis we’ll put together a plan that actually fits inside that window. Consultations and bookings go through our clinic, and we can coordinate care in English.