Laser and energy treatments for darker skin.

In 1975 a Harvard dermatologist named Thomas Fitzpatrick needed a quick way to sort patients for a light-based psoriasis treatment: how badly do you burn, and how well do you tan? His original scale had four types, all for white skin. Types V and VI were added in 1988 to cover brown and Black skin [17].

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Two things to know about it. First, it’s a questionnaire about sunburn, not a measurement of melanin. Two people who both answer “rarely burns, tans easily” can have quite different amounts of pigment in the epidermis, and it’s the pigment that the laser interacts with. Second, it was never designed to predict laser risk; the laser world adopted it because it was already there. We use it, but as a starting point. Your actual skin, examined under magnification and, for higher-risk treatments, tested with a small spot before we commit, is what decides settings.

You’ll see “skin of color” used to mean roughly types IV–VI. That’s how we use it here.

Lasers don’t see “skin.” They see three things that absorb light: water, blood (hemoglobin), and pigment (melanin). Each treatment picks a wavelength that one of those targets absorbs more than the others, and delivers energy fast enough to heat the target before the heat can spread. That principle, selective photothermolysis, is the basis of every light-based treatment since 1983.

The problem in darker skin is that the target and the bystander are made of the same stuff. When we want to disable a hair follicle, we’re aiming at the melanin in the hair. When we want to fade a sun spot, we’re aiming at the melanin in the spot. But the epidermis over the top is full of melanin too, and it’s in the way. Picture trying to warm one dark stone at the bottom of a shallow pond using a heat lamp, when the surface of the pond is also dark. Most of the energy gets grabbed at the surface before it reaches the stone. The stone stays cool and the surface burns.

Wavelength is the way out. Melanin absorbs short wavelengths strongly and long wavelengths weakly.

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At 532 nm, or across the broad band an IPL emits, the epidermis in type V skin soaks up a large share of every pulse. At 1,064 nm, the Nd:YAG wavelength, melanin absorption is a small fraction of that, so far more energy passes through the pigmented surface to reach the follicle or vessel underneath. That single curve explains why the long-pulse Nd:YAG became the standard device for hair reduction in Fitzpatrick IV–VI skin [18][19][20], and why we won’t point an IPL at type V skin no matter how the sales rep phrases it. (We do offer hair reduction; it’s a small part of what we do and has its own page, but this guide is about safety, not sales.)

Our own hair reduction in types V–VI runs on the 810 nm diode rather than the 1,064 nm Nd:YAG, so it is worth being straight about what that means. Melanin absorbs 810 nm more strongly than 1,064 nm — that is what the curve above shows — which means the epidermis is not being protected by the wavelength. It is being protected by cooling: contact cooling at the handpiece and a Zimmer Cryo 6 chilled-air unit running on the treated skin throughout. The trial evidence for the diode at conservative fluence covers phototypes III–V [20]; type VI sits beyond it, which is why a delayed test spot is not optional there. And the energy is not what we reduce to stay safe. The section on paradoxical hypertrichosis below explains why backing the fluence off is the one adjustment that can make things worse.

Three more levers move the risk in the right direction, and every one of them is on the settings screen:

• Longer pulses. Stretching the pulse gives the thin epidermis time to shed heat while the bigger, slower-cooling follicle or vessel keeps accumulating it.
• Cooling. Chilling the surface before, during and after each pulse protects the epidermis directly. Contact cooling, cold air, or both.
• Test spots read at the right time. In types V–VI, a burn or a pigment reaction can take 48–72 hours to show. A test spot read at ten minutes is theater.

Every one of these is preventable, and every one of them walks into practices like ours after being done elsewhere.

• Burns and blisters. Too much epidermal absorption, usually from the wrong wavelength, a short pulse, no cooling, or treating tanned skin.
• Post-inflammatory hyperpigmentation (PIH). Dark patches that appear one to four weeks after a treatment injures the skin. The most common complication of any energy treatment in types IV–VI. Usually temporary, sometimes lasting a year or more, and much easier to prevent than to treat.
• Hypopigmentation. Light patches, from damage to melanocytes. Can be permanent. This is the outcome we design everything to avoid.
• Scarring. Rare, but more likely in darker skin after burns, and more likely again in anyone with a keloid history.
• Leukotrichia. White hairs after hair-reduction treatment; reported particularly after IPL [21].
• Paradoxical hypertrichosis. More hair after a treatment meant to remove it. Rare, poorly understood, and disproportionately a problem on the face and neck. Section below.

A few named devices deserve a direct word. IPL is not a laser; it’s a broad flash of many wavelengths, weighted toward the short ones melanin loves. Our own device’s manufacturer limits IPL to types I–IV, and so do we. Alexandrite (755 nm) hair-removal lasers are excellent in fair skin and a burn risk in dark skin. Full-field CO₂ resurfacing carries a well-documented PIH risk in types IV–VI [8][9]. And any device on tanned skin is a mistake: a tan is extra melanin the settings weren’t chosen for. We’ll reschedule you rather than treat a tan, and we’ll do it even when you’re annoyed.

This is the complication nobody mentions at the consult, so we’re going to over-explain it.

What it is. New, thicker, darker hair appearing in or right next to an area that was treated to remove hair. It usually shows up after a few sessions rather than after the first one, and the new hair is often terminal hair growing where only fine vellus “peach fuzz” existed before.

How common. A 2021 systematic review pooling about 9,700 patients found an overall rate of roughly 3%, but with a striking pattern: almost all of it was on the face or neck, with a rate of only about 0.08% everywhere else on the body [22]. Facial series run higher. In one review of 543 women treated for facial hair, about 10% developed new hair, mostly in the beard area [23]. So the honest number is “rare on the body, not rare on the face.”

Who’s at risk. Consistently reported: treatment on the face or neck; women; fine dark vellus hair already present in the area before treatment; hormonal conditions such as polycystic ovary syndrome. Case series have reported it disproportionately in Fitzpatrick types III–V and in patients of Mediterranean, Middle Eastern and South Asian background [24][25][26]. We’ll be precise about the evidence here: the pooled analysis found the data on skin type too thin to confirm or rule out that association [22], and the largest facial series didn’t find one [23]. Treat “darker skin is a risk factor” as plausible and often reported, not proven.

What we think causes it. Here’s the part that matters for how a device gets used. The leading explanation, supported by the way these cases behave, is sub-therapeutic energy: a pulse that delivers enough heat to reach the follicle and disturb it, but not enough to destroy it [24][26][27]. A follicle that’s warmed but not killed doesn’t just shrug it off. Heat and the inflammation that follows it can push resting follicles into their growth phase, synchronize neighboring follicles, and convert fine vellus follicles into terminal ones. There are case reports of doubled hairs growing from single follicles after deliberately low-fluence treatments [28][29]. In short, a low dose isn’t a partial treatment. It can be a growth signal.

Two other clues point the same way. First, when the extra hair is treated again at an adequate, properly cooled setting, it usually responds; the original description of managing this complication was essentially “treat it correctly” [27], and the 2021 review found improvement with continued treatment in three of the four studies that tracked it [22]. Second, hair growth has also been reported after IPL used for skin treatments, not hair removal, at settings that were never meant to destroy a follicle [30]. Energy that reaches follicles without killing them seems to be the common thread.

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Why this matters more in darker skin. Every hair-removal setting has to clear two bars: enough energy to destroy the follicle, and not so much that the epidermis burns. In fair skin those two bars are far apart. In darker skin, with a device that melanin absorbs strongly, they move toward each other until there may be no gap at all. An operator who’s worried about burning you will naturally turn the energy down, and now every pulse lands in the zone that stimulates hair instead of the zone that kills it. That’s the trap: under-treating to be safe is how you get hair on someone’s jawline.

The fix is not less energy. It’s choosing the wavelength that opens the window back up (1,064 nm in types V–VI), stretching the pulse, cooling the surrounding skin so the edge of each spot, where energy tails off into the sub-therapeutic range, doesn’t warm the neighbors, and using enough energy to reach the endpoint we’re looking for. Where the window won’t open, we say so, and you keep your money.

What we do about it here. We counsel every facial hair-reduction patient about it before the first session. We treat the face and neck at adequate, cooled, tested settings rather than timid ones. We’re careful with patients who have a lot of fine dark facial hair, and we ask about hormonal history because untreated PCOS is a set-up for disappointment. If it happens, we tell you, and we treat it properly rather than abandoning the plan.

Two things to notice in that table. First, “safe” is never just the device; it’s the device plus the wavelength plus the pulse plus the cooling plus the test spot plus the operator. Second, for texture and scarring, the best tool in darker skin is one that isn’t a laser at all. RF microneedling is genuinely colorblind and, for acne scars in types IV–VI, it’s usually where we start.

Every energy treatment here in types IV–VI runs through the same steps, and they’re not negotiable:

1. Consultation first, free, no treatment room required. We score your Fitzpatrick type together, then examine the skin itself, including under a dermatoscope where it helps.
2. History that matters. Recent sun, tanning beds, tanning products, hormonal conditions, keloid history, prior pigment reactions to injury, and the medications that make skin more light-reactive.
3. Test spot, read at the right interval. For types V–VI on hair-reduction and pigment devices, that’s 48–72 hours, not ten minutes.
4. Conservative first session, then titrate. We’d rather add energy at session two than apologize after session one.
5. Pigment plan in place before we start. Sunscreen daily, a pre-treatment topical regimen where it’s indicated, and clear instructions on what to watch for and when to call.
6. Longer intervals. Darker skin often needs more time between sessions to fully settle. We schedule for that.
7. No tanned skin. No exceptions.

Some people will leave the consult without a treatment plan because the safe window for what they want doesn’t exist on our platform, or doesn’t exist at all. Deep resurfacing on type VI skin. IPL for anyone above type IV. Fast, aggressive hair reduction on a tanned face. We’ll tell you, and we’ll tell you what we’d do instead, even when “instead” is a referral out or a prescription that costs twenty dollars.