Sambrow Journal · Markham
Why Asian Skin Needs a Different Laser Strategy: PIH, Melasma & Conservative Settings
The rebound darkening nobody warns you about, and how to avoid being on the wrong side of it — by Sambrow Markham
TL;DR
Most Markham and Toronto clients of East and Southeast Asian background sit at Fitzpatrick III or IV, and that single fact should change how every energy-based treatment is delivered to them. Melanocytes in more pigmented skin respond to inflammation by producing more melanin, so the same laser energy that clears a sun spot cleanly on paler skin can trigger post-inflammatory hyperpigmentation — a rebound darkening that typically takes 3 to 12 months to fade and occasionally does not fade completely. This is not a rare complication and it is not an exotic risk. It is the single most predictable adverse outcome in this population, it is largely preventable with conservative parameters and a test patch, and it is routinely under-discussed at consultation. Sambrow does not perform laser or IPL — our Markham studio sits in the non-invasive tier, from $288 for drainage and $980 for a facial program — but we see the aftermath often enough to write this guide. Below are the six situations where it happens, and what to do if you are already in one.
When to Wait It Out, When to Change Course, and When to See a Dermatologist
Immediately after any energy treatment, darkening is expected and normal. Pigmented lesions typically darken before they flake away over roughly one to two weeks, and mistaking that for a complication causes unnecessary panic. Wait through that phase. What is not normal is diffuse darkening across untreated areas, darkening that appears two to four weeks after the session rather than immediately, or a patch that is more pigmented than before you started. That pattern is post-inflammatory hyperpigmentation, and the first correct action is to stop all further sessions of the same treatment rather than proceeding with the next one on schedule. Continuing a course through active PIH is the most reliable way to make it worse, and clinics do it more often than they should because the course is already paid for. Return to your treating provider and ask for a written management plan, and expect a realistic timeline of three to twelve months. See a dermatologist rather than the treating clinic if the pigmentation is worsening after eight weeks despite treatment, if you have textural change or scarring rather than pigment alone, if there is blistering, crusting, or open skin at any point, or if you were treated for melasma and it has returned worse than baseline. Seek same-day care for blistering with pain and spreading redness, which suggests a burn with possible infection rather than pigmentation.
Diffuse brown darkening across the whole treated area, appearing two to four weeks after the session
Watch closelyLikely causes
- •Post-inflammatory hyperpigmentation — melanocytes in Fitzpatrick III–IV skin respond to thermal inflammation by upregulating melanin production
- •Energy settings calibrated for paler skin, where the same fluence produces far less melanocyte stimulation
- •No test patch performed, so the skin's individual reactivity was never established before a full-face session
- •Sun exposure in the days immediately before or after treatment, which primes the same pathway
What to do
- →Stop the treatment course now rather than attending the next scheduled session — continuing through active PIH reliably worsens it
- →Rigorous daily broad-spectrum SPF 50, reapplied, and physical shade — this is the single highest-impact action and it is not optional
- →Return to the treating provider for a written management plan, which commonly includes topical tyrosinase inhibitors under supervision
- →Support barrier recovery, because inflamed compromised skin keeps the pigment pathway active
- →Expect three to twelve months for resolution and photograph monthly in identical light, because month-to-month change is invisible day to day
The treated spots got darker immediately and look worse than before
MinorLikely causes
- •This is usually the expected post-treatment response rather than a complication — targeted pigment darkens as it is broken up
- •Micro-crusting forms over treated lesions and appears as dark flecks before it sheds
- •The contrast against surrounding skin makes the effect look more dramatic than it is
- •Anxiety here is common precisely because clinics under-explain this phase at consultation
What to do
- →Wait through one to two weeks before drawing any conclusion — this phase resolves as the crusts shed naturally
- →Do not pick, scrub, or exfoliate the darkened areas, which converts a normal response into genuine PIH
- →Keep the area moisturised and protected from sun throughout the shedding phase
- →Photograph on day 1, day 7, and day 14 so you can see the trajectory rather than guessing
- →If darkening spreads beyond the treated spots into surrounding skin, it has become the first case above
Melasma treated with laser or IPL that came back worse within months
Watch closelyLikely causes
- •Melasma behaves like a chronic inflammatory condition rather than a static pigment deposit, and heat alone can provoke it
- •IPL and many laser modalities deliver significant thermal load, which is precisely the trigger melasma responds badly to
- •Recurrence is common even after apparently successful clearance, because the underlying tendency was never addressed
- •Hormonal drivers such as pregnancy, oral contraceptives, and hormone therapy continue regardless of what the device did
What to do
- →Stop energy-based treatment for melasma and get a dermatologist opinion before anything else — this is a medical condition rather than a cosmetic spot
- →Photoprotection is the foundation and includes visible light, so a tinted mineral sunscreen with iron oxides outperforms a clear one
- →Expect long-term management rather than cure, and treat any clinic promising permanent clearance as a warning sign
- →Review hormonal contributors with a physician, since they may be the dominant driver
- →Heat itself matters — hot yoga, saunas, and prolonged cooking heat can all aggravate melasma independent of UV
One area cleared beautifully and an adjacent area darkened
Watch closelyLikely causes
- •Uneven energy delivery across the treatment field, often from operator technique rather than the device itself
- •Overlapping passes concentrating fluence in some zones and not others
- •Genuine regional variation in skin thickness and melanin density across the face
- •Underlying melasma present in one zone but not the other, responding differently to identical settings
What to do
- →Photograph the pattern clearly and bring it to the treating provider, because the distribution is diagnostic
- →Do not accept a further full-face session at the same settings while the discrepancy is unexplained
- →Ask specifically whether the darkened zone may have subclinical melasma, which changes the entire approach
- →Treat the darkened area as PIH — sun protection and supervised topical management — while pausing the course
- →A provider who cannot explain a patchy result is not the provider to fix it
Pigmentation cleared, then returned within one summer
MinorLikely causes
- •The UV exposure that produced the original sun damage continued unchanged after treatment
- •Sunscreen applied at a fraction of the tested quantity, which is extremely common and provides far less protection than the label implies
- •Incidental daily exposure through car windows and near windows, which is continuous rather than occasional
- •No maintenance plan was discussed, so the result was framed as permanent when it never could be
What to do
- →Treat sun protection as the treatment and the laser as the reset — that ordering is the whole strategy, not an add-on to it
- →Use roughly a quarter teaspoon for the face, reapplied every two hours of daylight exposure
- →Add physical barriers, because a wide-brim hat outperforms any reapplication schedule for real-world compliance
- →Budget for maintenance sessions rather than expecting a single course to hold indefinitely
- →If a clinic sold the result as permanent, factor that into whether you return to them
Blistering, weeping, crusting, or a burn during or after treatment
UrgentLikely causes
- •Energy settings substantially too high for the skin type being treated
- •Inadequate cooling during delivery, or a device cooling fault
- •Treatment performed on recently sun-exposed or tanned skin, which raises effective melanin absorption
- •Recent isotretinoin use or another photosensitising medication not screened for at consultation
What to do
- →Contact the treating provider immediately and seek medical care the same day if there is pain, spreading redness, or fever
- →Do not apply home remedies, ice directly to broken skin, or any active skincare on the area
- →Photograph everything and record dates and settings if you can obtain them, because this may become a formal complaint
- →Burns carry genuine scarring and permanent pigmentation risk and are managed medically, not cosmetically
- →In Ontario a complaint against a regulated professional goes to their college — CPSO for physicians, CNO for nurses
Ten Rules That Prevent Most of This
- ✦Establish your Fitzpatrick type before the consultation ends, and if the provider has not raised it, raise it yourself — it should drive every parameter they choose
- ✦Insist on a test patch 48 to 72 hours before the first full session on any light or energy-based treatment, and treat refusal as a reason to leave
- ✦Ask directly how many treatments the operator has personally performed on Fitzpatrick III–IV skin, not how many they have performed overall
- ✦Require conservative first-pass settings that build across sessions, because on more pigmented skin an aggressive single session buys risk rather than speed
- ✦Avoid sun exposure for at least two weeks before treatment — tanned skin has more competing melanin and materially higher burn and PIH risk
- ✦Disclose all photosensitising medications and any isotretinoin use within the past six months, without waiting to be asked
- ✦Never accept laser as a first-line answer for melasma, and treat any clinic that offers it at first consultation as a signal about that clinic
- ✦Build in barrier preparation for the two weeks before and four weeks after, because inflamed skin pigments more readily than healthy skin
- ✦Commit to daily broad-spectrum SPF 50 with a tinted mineral formulation, which blocks visible light as well as UV and matters more on pigmented skin
- ✦Photograph in identical light monthly, since PIH resolves too slowly to perceive day to day and you will otherwise conclude nothing is happening
Frequently Asked Questions
Does Sambrow perform laser or IPL? +
No. Sambrow is a beauty and wellness studio in Markham operating entirely in the non-invasive tier — no lasers, no IPL, no injectables, and no controlled acts. We wrote this guide because a substantial share of our clients are Fitzpatrick III–IV and come to us either preparing for a clinic procedure or recovering from one that went badly. Barrier preparation before and barrier recovery after are genuinely where we contribute, and both materially affect pigmentation risk. What we will not do is claim we can treat PIH with a facial, because supervised topical management and rigorous photoprotection are what actually resolve it.
How common is post-inflammatory hyperpigmentation on Asian skin? +
Common enough that it should be discussed at every consultation, and it frequently is not. Risk rises with Fitzpatrick type, so Fitzpatrick IV carries meaningfully more risk than Fitzpatrick II from identical settings, and it rises further with aggressive parameters, inadequate cooling, recent sun exposure, and any pre-existing inflammation. The important framing is that this is a predictable, largely preventable outcome rather than bad luck. If a provider treats your skin type as an afterthought rather than as the primary input to their settings, the risk conversation has already gone wrong.
How long does PIH take to fade? +
Typically three to twelve months, and occasionally longer, which is dramatically slower than most people expect when they book a treatment for a spot that had been there for years. Epidermal pigment resolves faster than dermal pigment, and a dermatologist can distinguish them, which matters because the prognosis differs substantially. Sun exposure during this window will extend it indefinitely, so photoprotection is not merely helpful but determines whether resolution happens at all. Monthly photographs in identical light are the only reliable way to see progress on this timescale.
Is picosecond laser safer than IPL for my skin type? +
Generally it carries a lower thermal burden, which matters because heat drives the melanocyte response, and picosecond devices work by delivering ultra-short pulses that shatter pigment mechanically rather than by heating it. That is a genuine advantage on Fitzpatrick III–IV skin. But device class does not override operator competence — an aggressively set picosecond treatment on unprepared skin can absolutely produce PIH, and a conservatively delivered IPL by an experienced operator may not. Ask about settings, test patching, and specific experience with your skin type rather than choosing on device name alone.
Can I do anything before treatment to lower my risk? +
Yes, and preparation is more useful than most people realise. Strict sun avoidance for at least two weeks beforehand reduces competing melanin and lowers both burn and PIH risk. A calm, intact barrier going in matters because inflamed skin pigments more readily, so if you have been over-exfoliating or layering actives, stopping and repairing for several weeks first genuinely changes the odds. Some providers prescribe a topical preparation protocol for higher-risk skin types, which is worth asking about directly rather than waiting to see whether it is offered.
My clinic says my skin type does not matter for their device. Is that credible? +
No. Melanin absorption is fundamental physics for any light-based treatment, and skin type determines how much of the delivered energy is absorbed by background pigment rather than by the intended target. Every credible protocol adjusts for it. A provider who dismisses the question is either unfamiliar with treating pigmented skin or is prioritising the booking over the outcome, and either explanation is sufficient reason to consult elsewhere. This one question is among the most efficient filters available to you at consultation.
Should I treat melasma with a device at all? +
Not as a first-line approach, and not without a dermatologist involved. Melasma is a chronic, relapsing condition with hormonal and heat sensitivity rather than a static pigment deposit, and energy-based treatment can provoke it — sometimes leaving it worse than baseline. Standard management begins with rigorous photoprotection including visible light, topical therapy, and identifying hormonal drivers. Some device protocols have a role in carefully selected cases under specialist supervision, but a clinic offering to laser melasma at a first consultation without any of that context is describing a sales approach, not a treatment plan.
What does barrier preparation actually involve? +
Concretely: stopping retinoids and acids around two weeks before, stopping physical exfoliation and hair removal on the area about three days before, and focusing on hydration and barrier lipids throughout so the skin arrives calm rather than reactive. Afterwards it means gentle cleansing, occlusive support, no actives until the provider clears them, and absolute sun protection. Our timeline guide on skincare before and after laser treatment sets out the specific windows day by day, and it is the piece most people skip because no one is selling it to them.