I have been fighting pigmentation for most of my adult life. Freckles and sunspots across both cheeks, and melasma that turns up at my temples and takes its time leaving. That's why I'm obsessed with clear, even skin, and it's why I eventually stopped reading about lasers and booked one.
I talked myself into something north of a thousand pounds on the grounds that it comes out at pennies a day once you amortise it over three years of collagen growth. Not a sum any accountant would sign. I have signed it several times.
This isn't a case for having it done. I'm not qualified to make one and I'd be wary of anyone who was. It's what I wish I'd read before I booked, and what I wish somebody had handed me the week after.
What I booked was a Moxi, which is the gentlest device on the menu rather than the most impressive one. Why is most of this article.
September is when I think about this, and not because of the new-term feeling. Laser is a seasonal purchase, and autumn is the season, for reasons that are about ultraviolet light rather than about mood.
Why autumn is laser season
Freshly lasered skin is unusually good at making pigment, which is the problem with having it done in July. Every clinic protocol I've read asks for no sun and no tanning for fourteen days beforehand, fake tan included, and daily sunscreen for up to three months afterwards. Try running that in a British summer and you'll spend the whole recovery negotiating with a beer garden.
Autumn removes the negotiation. UV drops, you're covered up anyway, and you sweat less, which matters more than it sounds when your barrier is open. There's a runway argument too: most non-ablative devices want three or four sessions four to six weeks apart, so a course starting in September finishes before the clocks go forward and the point of it becomes visible in April.
What people mean when they say laser
Almost nobody books "a laser". They book a device, and the devices are not interchangeable. The most useful thing to know before a consultation is roughly where each one sits.
The first split is ablative or non-ablative. Ablative devices remove tissue. Non-ablative ones heat the skin under an intact surface and let the repair do the work. Everything follows from that: depth, downtime, result, and how much risk you carry if your skin makes pigment readily.
BBL isn't a laser at all. BroadBand Light is intense pulsed light, a broad spectrum rather than a single focused wavelength. It heats pigment and haemoglobin so the body clears them, which makes it excellent on brown spots, redness and visible capillaries, and useless on texture. Minimal downtime, usually three to five sessions. Clinics generally place it at Fitzpatrick I to III.
Moxi is a 1927 nm thulium fractional laser, non-ablative, working at around 100 to 200 microns. That's shallow, and shallow is the design rather than a shortcoming. It works on sun damage, superficial pigmentation and tone, with a day or two of downtime, and it's rated across all Fitzpatrick types where the deeper devices aren't.
It gets sold as "prejuvenation", a word that quietly means it doesn't do much, and I'd push back on that. The 2025 review of this wavelength found improvement in pigmentation, texture and scarring, which is correction by any reading. It's gentler, so it asks for more sessions and gives less per visit: three or four to start, four to five weeks apart, then maintenance. What you buy with that patience is a margin of safety. And it's worth noticing who gets talked out of the device by a marketing word, because for a lot of deeper skin this isn't the cautious option. It's the only one on the menu. Clear + Brilliant sits in the same territory.
Fraxel Dual runs two non-ablative wavelengths, 1550 nm and 1927 nm, and the 1550 reaches up to 1400 microns, which is seven times deeper than Moxi. That depth is what lets it work on acne scarring and real wrinkles rather than surface tone. Three to five sessions, three to five days of downtime each. In Fitzpatrick IV to VI it's run at lower coverage, and post-inflammatory hyperpigmentation is a documented risk.
Halo is the hybrid: ablative 2940 nm and non-ablative 1470 nm delivered together, to around 700 microns. It's the one that changes a face in a single session, and it charges for that in downtime, three to seven days. Clinics tend to cap it at Fitzpatrick IV.
Fully ablative CO2 sits at the far end. Biggest result, longest recovery, highest risk. In deeper skin the common complication is post-inflammatory hyperpigmentation, which is temporary and can still run for months. The rarer one is hypopigmentation, patches that come back lighter rather than darker, and that's the one worth being frightened of, because it can be permanent. Where clinics do offer it on deeper skin, they run it fractionally rather than full-field, at lower energy, with wider spacing between the columns.
Why I booked the gentlest device on the menu
I'm mixed race with olive skin, somewhere between a III and a IV on the Fitzpatrick scale. Not deep enough for anyone to turn me away. Not fair enough for the risk to be theoretical. That in-between is an awkward place to make this decision from, and it's where a lot of readers are standing.
Skin that makes pigment efficiently under normal conditions makes it efficiently under thermal injury. That's the whole of it, and it's why the deeper devices are capped where they are: BBL at Fitzpatrick I to III, Halo up to IV, and the 1927 nm non-ablative devices rated across the range because they stay shallow.
Melasma changes the calculation again, and mine is the deciding factor. Melasma is the pigmentation that comes back, and heat is one of the things that brings it. A 2025 systematic review of the 1927 nm wavelength across 17 studies and 448 participants found it improved pigmentation, texture and scarring with mild and transient adverse events, and reported relapses specifically in melasma. Most of those studies carried a moderate to high risk of bias, so read it as a direction rather than a promise. The direction is clear enough: this is the mildest end of the menu, it works on melasma, and melasma still returns. Which tells you how much the year afterwards is doing.
So I took the smallest result with the smallest risk, several times, rather than one large result and a complication I'd then be treating for a year. That was my call for my face, not a recommendation for yours. The next section is the part that generalises.
Your Fitzpatrick number is a shorthand, not a diagnosis
This is the part the brochures leave out, and it matters more than which device you pick.
The Fitzpatrick scale was built to describe how skin burns in the sun. It was not built to predict how skin behaves under a laser, and it flattens a great deal on the way. Two people who both call themselves a IV can heal quite differently depending on ancestry, and a mixed face doesn't always sit tidily on one number at all. It's a real enough limitation that a separate Laser Ethnicity Scale was developed to predict healing time and outcome more accurately than Fitzpatrick alone manages.
East and Southeast Asian skin is the clearest case, and it gets left out of "darker skin tones" as a category almost every time. A study of 37 Chinese patients across 119 fractional resurfacing sessions, all Fitzpatrick III to IV, found post-inflammatory hyperpigmentation in 11.1 per cent on standard photographs and 17.1 per cent under cross-polarised light. That's the same pair of numbers on the Fitzpatrick chart as a great many white European faces, and nothing like the same rate.
And in that study the risk sat in the settings rather than in the skin. Sites treated at high density showed post-inflammatory hyperpigmentation in 50 per cent of cases, against 4 per cent at low density. Pigmentation clustered where the practitioner had made repeated passes without cooling. Recent sun exposure raised the risk independently of skin type.
A twelvefold difference in complication rate came out of a dial. Dr Vincent Richer, assistant professor of dermatology at the University of British Columbia, describes the approach that follows from it: "We might need a few more treatments to reach the outcome. We can increase our settings progressively if things go well." Which is the same trade the whole of this article keeps arriving at. More visits, less per visit, a result you get to keep.
The risks aren't identical either. Pigment is the one everybody talks about, but a tendency towards keloid or hypertrophic scarring travels separately, runs in families, and doesn't show up anywhere on a skin-tone chart. Prolonged redness and slower healing are also more common in deeper skin, and neither is a pigment problem.
So the useful consultation isn't the one where somebody looks at your face, writes down a number and reaches for the settings sheet. It's the one where they ask what your skin has done before. Richer puts the reason plainly: "The personal history of PIH is going to be a really good indication of the risk of it developing." So expect to be asked how you've healed from a spot, a cut, a burn, whether anyone in your family scars badly, whether pigment has ever arrived after inflammation and how long it took to go. If nobody asks, ask them. Ask about a test patch too, and how many people with skin like yours they've treated on that setting. The answer should be a number.
What the manufacturer publishes, and what your clinic will tell you
Sciton, who make Moxi and Halo, publish post-care asking for lukewarm water and a gentle cleanser, and define neither. That's it. Most device makers in this category publish less. So the protocol comes from clinics, and reputable ones broadly agree with each other. Pulled together, here is what they ask for.
Before: no sun and no sunbeds for fourteen days, and no fake tan either, since a laser reads a sprayed tan as pigment. Stop retinoids for seven days. Stop glycolic, salicylic, other AHAs and benzoyl peroxide for seven days. No waxing for fourteen days. Arrive with a bare face.
After: cleanse twice a day from the morning after with lukewarm water and your hands only, patting rather than rubbing, and nothing abrasive anywhere near it. Moisturise generously whenever it feels dry. Sunscreen daily from the day after, SPF 30 or higher, for up to three months. No retinoids, no acids, no scrubs, no benzoyl peroxide until the skin has closed. Vitamin C only if it doesn't sting. No strenuous exercise or sweating until you've healed, and a hat outdoors for a couple of months.
Where your clinic's sheet and this article disagree, follow theirs. They saw your face and I didn't.
What the first week looks like
Everyone warns you that day three is the worst of it. You are still not ready for day three.
The low point is common to all of them. What turns up on the day isn't. Every device on this page gets worse before it gets better, and bottoms out around day two or three. What's arriving at your surface depends on which one you had, and it's worth knowing which film you're in.
After a non-ablative fractional laser, so Moxi, Fraxel or Clear + Brilliant, what surfaces has a name worth knowing: MENDs, microscopic epidermal necrotic debris. The treated tissue is carried up through a surface that stayed intact and shed from the top, which is why it appears as tiny dark specks, often described as coffee grounds. The skin bronzes alongside them and turns to fine sandpaper for a couple of days. That's particular to this class rather than to lasers in general: it's how these devices get rid of what they treated.
After an ablative or hybrid device, so Halo, erbium or CO2, there are no MENDs, because the tissue was removed on the day rather than pushed out over a week. You get swelling, weeping and crusting first, then peeling as the new surface forms underneath, across five to fourteen days depending on depth.
After IPL or BBL, the pigment it targeted darkens rather than the whole face bronzing, and those darker spots lift and flake off over roughly a week to ten days.
Mine went exactly as described. No reaction, no drama, nothing I hadn't been told to expect, and I was very happy with the result. By the end of the first week the redness had gone and everything looked brighter and smoother, which is when you understand what you paid for.
The one thing I got wrong was touching it. Not deliberately. Absently, the way you rest your face on your hand at a desk and then rub without noticing you're doing it, three or four times an hour, for days.
I'd catch myself halfway through and get a proper fright, because the one outcome I didn't want was to pay for a laser and then hand myself a mark. Helping that debris along is the most reliable way to get one. Leave it alone. Sit on your hands if that's what it takes.
__FIGURE__Routine one: until the skin has fully healed
Three steps, no actives, and no decisions in any of them. The week after a laser is not the week to be having ideas about your face.
How long that week lasts depends on what you had. A light non-ablative device like Moxi or Clear + Brilliant closes over in a day or two, with the flaking finished around day five to seven. Fractional ablative re-epithelialises in about five to seven days. Fully ablative takes ten to fourteen, with redness for weeks after that. So the honest range is five days to a fortnight, and the trigger for moving on is not a date. It's skin that has closed, stopped flaking and stopped feeling tight.
Nothing active goes near it before that, whatever the device. And the deeper the treatment, the longer the wait afterwards: UK guidance after ablative resurfacing puts retinoids, acids and vitamin C back at four to six weeks and on the practitioner's say-so, which is a long way from the seven days you'll read on a non-ablative aftercare sheet. Take your number from your clinic rather than from this paragraph.
Cleanse, from the morning after, twice a day. ISNTREE Yam Root Vegan Milk Cleanser. This is what "a gentle cleanser" means when somebody writes it down. It barely lathers and works through an oil phase rather than a detergent one, so it lifts sunscreen by dissolving it rather than stripping it. Your skin has only just put its lipids back, and a foaming surfactant takes some with it every wash. It also needs no working in, which is the instruction underneath the instruction: hands, lukewarm water, patting.
Moisturise, from day one, whenever it feels tight. Two answers here, because a non-ablative laser and an ablative one are asking for different things.
After a non-ablative device: PURITO SEOUL Wonder Releaf Centella Cream Unscented. This is the one I used, and it earns its place for a reason I'd have put second. It's declared fragrance-free and essential-oil-free, and clinic protocols specifically warn off essential oils and coconut oil during recovery, which quietly rules out most of the calming creams on the shelf. Centella has the only controlled trial in this category: after a laser it made skin look significantly calmer at days two, four and seven, and moved the barrier measurements not at all. Ceramide NP does the sealing centella doesn't, and the gel-cream weight is right for skin that's bronzing rather than raw.
After an ablative or hybrid device: ZEROID Soothing Cream. When the surface has been taken off rather than heated through, calming isn't the job. Rebuilding is. ZEROID came out of Seoul dermatology research and sells through clinics, and its MLE structure sets ceramides, cholesterol and fatty acids at the 1:1:1 ratio your barrier is built in, with panthenol and 2 per cent niacinamide alongside. Beta-glucan sits underneath, the strongest re-epithelialisation result in the category: 10.9 days to wound closure against 16.3 for placebo. No alcohol, which matters on skin that has just replaced its surface.
Two I'd wait on. The Dr.Althea 345 Relief Cream is a better-stocked formula than either on paper, and it comes back below. Its base is tea tree leaf water, and while a hydrosol is not an essential oil, a freshly lasered face is not where I'd find out. ILLIYOON's Ceramide Ato Concentrate is superb and the wrong weight: it's built for cracked winter shins, and a flaking face doesn't want anything that rich on it.
Protect, from the day after, for three months. SKIN1004 Madagascar Centella Hyalu-Cica Water-Fit Sun Serum SPF50+. The non-negotiable one, and the reason autumn was the right month. A serum weight with no cast on any depth of skin, with madecassoside and asiaticoside on the redness a filter only partly prevents. The weight is the point: a fluid spreads with a pat, where a cream needs working in.
What about vitamin C. It has real evidence after fractional resurfacing, for helping skin finish healing rather than for keeping pigment away: scabs detached by day seven on 61 per cent of treated sides against 34 per cent in a 64-person trial. Clinics allow it early if it doesn't sting. Mine did, so I waited.
Make-up goes back on once the flaking has finished, which is usually around a week. Be more careful about taking it off than putting it on.
Routine two: once you've healed, for pigmentation and fine lines
I have spent an amount of money on my face that I'd rather not total up, which is exactly why I care about the long stretches in between, when nobody is doing anything to it but me.
A Moxi buys two things: cleared surface pigment, and a stretch of better texture. The next twelve months either protect them or undo them, and there isn't a third option.
Upgrade the sunscreen at three months. Avocado Zinc SPF50 Natural Tinted Moisturiser. Not more sunscreen. Different sunscreen. In a randomised trial, a filter covering UV and short-wavelength visible light prevented melasma relapse better than one covering UV alone, and iron oxide pigments are what extend cover into visible light. A 2025 systematic review of everything tried to prevent dark marks after a procedure found sunscreen the only intervention with a clear result: topical steroids managed 58 per cent, oral tranexamic acid didn't prevent it, cooling devices made it worse.
The iron oxides do a second job, which is stopping a mineral filter reading chalky. I wear the Medium Light. Its limit is that the range stops at Medium-Dark, and in a piece about pigmentation risk in deeper skin that's worth saying plainly, because the readers most likely to need visible-light cover are the ones the shade range runs out on first. If that's you, the sunscreens collection has untinted formulas worth wearing daily.
And if tint isn't for you, or mineral filters have never suited you, keep the sunscreen you'll wear every morning. The iron oxide argument is a refinement sitting on top of a habit, and the habit is the half with the trial behind it. A tinted mineral formula going hard in a drawer protects nobody.
Because it isn't only about pigment. In a four-and-a-half-year randomised trial of 903 adults, funded by a research council rather than a brand, the group applying sunscreen daily showed 24 per cent less skin ageing than the group using it when they felt like it. The daily group showed no detectable increase in skin ageing at all across those four and a half years. That is the closest thing this field has to a guarantee, and it costs about twelve pounds a month.
Upgrade the moisturiser once you've healed. Dr.Althea 345 Relief Cream. The one I told you to wait on, and this is when you stop waiting. A recovery cream keeps skin comfortable; this one is built to keep it hydrated and smooth, which is a different brief. Hyaluronic acid in three forms binds water at three depths, so the plumping outlasts the morning. Ceramide NP and panthenol hold the barrier underneath, beta-glucan and centella carry the calming, and rice-bran PDRN adds a repair mechanism that is neither of those. Niacinamide sits in there on tone, which is convenient given what you had the laser for. On healed skin the tea tree leaf water base is a non-issue.
Add the active at around four to six weeks. PURITO SEOUL TXA 6 Niacinamide 10 Retinal Serum, built up slowly. One bottle, both jobs, which is why it's the only serum in this article.
On the pigment side: UV doesn't darken skin directly, it sets off a signal telling melanocytes to produce, and that signal can be interrupted at three points. Tranexamic acid at 6 per cent works on the signal. Niacinamide at 10 per cent stops finished pigment reaching the surface. On the texture side, retinoids are the best-evidenced topicals in dermatology: tretinoin holds a regulatory indication for fine wrinkles on around 1,300 patients of vehicle-controlled trial data, and the same trials found no benefit for coarse wrinkling or laxity. A useful map of what to expect.
The retinal is also why this waits longer than anything else here, and why you build it up rather than going nightly from the start. If you'd rather stay gentle, alpha-arbutin and kojic acid reach the same enzyme by other routes.
Unfortunately, and as too often in this literature, that 2025 review included no Fitzpatrick VI participants. The readers at highest risk of pigmentation returning are the least represented in the research on preventing it.
The Verdict: buy the sunscreen, then decide about the laser
If you take one thing from this, take the sunscreen, and take it whether or not you ever book a laser. It's the only recommendation on this page with a four-and-a-half-year randomised trial behind it, and it's the one that decides whether anything you pay for afterwards holds.
On the laser itself: if you have melasma or you're a Fitzpatrick IV or above, and somebody offers you Halo or ablative CO2 without asking about your pigmentation history, go elsewhere. Not because those devices are bad, but because the deeper ones need a practitioner who has treated your skin many times, and the shallow ones forgive more.
If your concern is brown spots and redness rather than texture, BBL may be the better spend, and it isn't a laser at all. If it's real scarring or real wrinkles, Moxi will disappoint you and Fraxel or Halo is the honest answer. If it's melasma, treat the laser as one part of a long management plan rather than a fix, because it relapses whatever you do to it. And if it's tone, freckling and sun damage, this is the treatment, in this season, with these two products afterwards, however many sessions it takes.
None of it makes the appointment work better. It keeps the year afterwards pushing the same way the appointment did, for a fraction of what the appointment cost, which I find suspiciously reassuring.
FAQs
How long after a laser treatment can I use retinol again?
Once the skin has closed, stopped flaking and stopped feeling tight, which is usually past a week for a non-ablative fractional laser and longer for anything ablative. Follow your practitioner's number over anything you read, and go back in at a lower frequency than you left off at. You also need to stop retinoids for about seven days before the appointment, so plan the pause at both ends.
Which laser is safest for olive or darker skin?
Generally the shallower and more conservative the setting, the lower the risk. Post-inflammatory hyperpigmentation and hypopigmentation are both more common from Fitzpatrick IV upwards, and in Asian skin at III to IV as well. The recognised mitigations are all versions of doing less: lower fluences, lower densities, longer pulse durations. Non-ablative fractional devices at 1927 nm are usually rated across all skin types; BBL is typically offered at I to III and Halo up to IV. Ask how many patients with skin like yours the practitioner has treated on that setting.
Why does my skin look worse a few days after laser?
Because it's working, and what you see depends on the device. After a non-ablative fractional laser the tiny dark specks appearing on day two or three are MENDs, microscopic epidermal necrotic debris, the treated tissue being carried up through an intact surface and shed; the skin bronzes and feels like fine sandpaper before it flakes. After an ablative or hybrid device there are no MENDs, because the tissue was removed on the day: you get swelling, weeping and crusting, then peeling as the new surface forms. After IPL, the targeted pigment darkens and lifts over a week or so. In all three cases, don't pick, don't exfoliate, and keep it moisturised.
Can I have a laser treatment if I have a tan?
No, and that includes fake tan. Clinics ask for at least fourteen days with no sun, no sunbeds and no self-tanner before treatment, because the device targets pigment and a tan gives it more pigment to find. It's the main reason autumn and winter are the sensible seasons for this.
The Part You Do at Home
The hard part is the week you can see it working and want to help. You can't help. Everything above is a strategy for making that easier: a bland cream so you stop noticing your own face, and a sunscreen you'll still be wearing in February.
Keep Reading
Skin Barrier Repair 101 goes deeper into what "keep it bland" means in practice, which is the half of this article doing most of the work.
