Pigmentation in darker skin: the peel problem.

Pigmentation in darker skin: why the strongest peel is almost never the answer

Cardiff has a large South Asian population, and a significant proportion of the patients who come to us about pigmentation have Fitzpatrick type IV, V or VI skin. Almost all of them arrive having been told the same thing somewhere else: that they need a stronger peel. Most of them don't. Some of them will be made worse by one.

This is a piece about why, and about what actually works instead.

First: it probably isn't what you've been told it is

Most people arrive using the word "pigmentation" as though it describes one condition. It doesn't. It describes an appearance with at least a dozen different underlying causes, and the treatment for one can actively worsen another.

The most common assumption is post-inflammatory hyperpigmentation — marks left behind by spots, scratches or eczema. That is a real and treatable thing. But PIH follows an event and sits exactly where that event was. If your pigmentation is symmetrical, has been there for years, and sits in the same places it does on your mother and your sister, it is not PIH and treating it as though it were will get you nowhere.

Here is what we actually tend to find.

Periorbital melanosis

Darkness around the eyes, usually present since adolescence, usually strongly familial. It is extremely common in South Asian skin and it is genuinely multifactorial: some true pigment sitting deep in the skin, some thin under-eye skin showing the blood vessels beneath, and often some shadowing caused by volume loss in the tear trough.

That last part matters enormously. If a significant proportion of your under-eye darkness is shadow rather than pigment, no amount of skin lightening will touch it — and any practitioner who sells you a course of peels for it without saying so is taking your money for something they know won't work.

Perioral and perialar pigmentation

Darkening around the mouth, the nasolabial folds and the chin. A recognised pattern, disproportionately affecting South Asian women, and frequently made worse by the very products bought to treat it.

Melasma

Symmetrical patches across the cheeks, forehead and upper lip. Hormonally influenced, worsened by pregnancy and the combined pill, and — critically — driven as much by heat and visible light as by ultraviolet.

Melasma is the condition most often made worse by aggressive treatment. It is inflammation-sensitive and prone to rebound, sometimes months after a course of treatment that initially looked successful.

You can read more about this condition on The British Association of Dermatologists.

Lichen planus pigmentosus

The one that gets missed. Diffuse grey-brown discolouration across the forehead, temples and in front of the ears, often with no visible inflammation beforehand. It looks like melasma to an untrained eye and behaves completely differently — it will flare in response to exactly the treatments that might help melasma.

Facial acanthosis nigricans

Velvety darkening over the cheekbones and temples. This one isn't really a skin condition at all. It is a visible marker of insulin resistance, and it is more common in South Asian patients, who develop insulin resistance at lower body weights than other populations.

Treat it as a cosmetic pigmentation problem and you have covered up a sign of undiagnosed metabolic disease.

Why we strongly advise that you take some blood tests, before we take a photograph. And yes, we offer this in-clinic.

Several genuinely common, genuinely treatable medical conditions present as facial pigmentation:

• Vitamin B12 deficiency, which causes hyperpigmentation and is common in vegetarian diets

• Iron deficiency

• Thyroid disease

• PCOS and insulin resistance, both more prevalent in South Asian women

  
  

None of these will respond to a peel. All of them will keep driving pigmentation for as long as they go unaddressed — and all of them are worth knowing about for reasons that have nothing to do with your skin.

We are a prescriber-led clinic with in-house phlebotomy, and we offer a wide blood testing service , so for patients presenting with diffuse facial pigmentation we will usually advise checking ferritin, B12, folate, thyroid function, HbA1c and vitamin D before starting anything. It is not an upsell. It is the difference between treating a cause and painting over a symptom.

The peel problem

Here is the uncomfortable mechanical truth about peeling darker skin.

A chemical peel works by causing controlled injury. The depth of that injury determines how much change you get. But injury is also what triggers pigment production — and skin with more active melanocytes responds to injury by making more pigment, more readily, and for longer.

So the depth of peel that would be strong enough to shift stubborn pigmentation in Fitzpatrick IV–VI skin is frequently the depth that causes post-inflammatory hyperpigmentation. You take a patient with pigmentation and hand them back different, sometimes worse pigmentation, several weeks later, once they've already paid for the course.

This is why we no longer offer medium-depth peels such as Jessner's, and why we are extremely conservative about peel depth in darker skin generally. Not because the treatment doesn't exist, but because for this specific group the risk-to-benefit maths doesn't work — and the treatments that do work are less dramatic, slower and considerably more effective.

What actually works

1. Sun protection, and specifically the right kind

This is not the boring bit before the real advice. This is the treatment. Everything else fails without it.

For darker skin one detail matters more than any other: your sunscreen needs to contain iron oxides. Visible light — ordinary daylight, and light from screens — drives pigment production in darker skin, and conventional UV filters do not block visible light at all. Iron oxides do. In practice that means a tinted mineral sunscreen rather than a clear one.

Every day. Reapplied. Indoors near windows too. Cloudy Welsh Tuesdays included.

2. Prescription topicals, properly sequenced

This is where the actual work happens, and it is why a prescriber-led clinic can offer options a beauty salon simply cannot.

Depending on what we find, that may include hydroquinone-based protocols such as the Obagi Nu-derm system Rx (versus Fx), tretinoin, azelaic acid, topical tranexamic acid, cysteamine or niacinamide — used in a defined sequence, with defined breaks, and adjusted as your skin responds. Not a shelf of products bought hopefully and used inconsistently.

3. Oral tranexamic acid, where appropriate

For melasma in particular, oral tranexamic acid has the strongest evidence base of anything available, and it is prescription-only. We screen carefully first — personal or family history of clots, thrombophilia, combined contraceptive use and smoking all need discussing — but for the right patient it changes results in a way topicals alone do not.

4. Procedures last, and gently

Once the skin is prepared and calm — usually after six to eight weeks of topical work — we may add treatment. Which one depends entirely on what we are treating.

Enerpeel MA. A 40% mandelic acid peel, and our starting point for most patients with deeper skin tones. Mandelic acid has a large molecule, so it penetrates slowly and evenly rather than hitting the skin all at once, which is why it is the acid of choice in skin of colour. This particular formulation uses a carrier system that releases it more gradually still, and includes MSM to reduce the risk of irregular pigmentation afterwards.

It is also the right choice for acne in darker skin — antibacterial, able to work inside the pore, and gentle enough that treating the acne doesn't leave you with the marks that treating acne so often causes.

PRX-T33. Where the concern is pigmentation itself rather than congestion, this is the better tool. It stimulates the deeper layers without wounding the surface at all, so there is no exfoliation and no inflammatory response — and therefore very little of the post-inflammatory pigmentation risk that makes conventional peeling unsuitable here. It also contains kojic acid, which actively suppresses pigment production rather than simply resurfacing over it.

Both are spaced generously. Both are stopped at the first sign of rebound. Neither is ever the opening move.

And to be clear about what a peel will not do. For melasma, no peel is the answer on its own — the results come from the sun protection, the prescription topicals and, where appropriate, oral tranexamic acid. A peel supports that work. It does not replace it, and anywhere you are offered one as a standalone solution for melasma, be sceptical.

What we will tell you honestly

Some of it may not fully clear. Where pigment sits deep in the dermis rather than the epidermis, topicals cannot reach it and no peel can remove it safely. We use a Wood's lamp at consultation to work out which you have, and we will tell you before you spend anything if the honest answer is significant improvement rather than resolution.

Under-eye darkness is often not pigment. Where it is shadow from volume loss, the answer may be a skin booster or filler rather than anything to do with pigmentation. Where it is vascular, it needs something different again.

This takes months. Anyone promising to clear years of pigmentation in three sessions is either inexperienced or not being straight with you.

And it needs maintaining. The tendency doesn't go away. The management continues, at a lower intensity, indefinitely.

Booking

If you have been offered a course of strong peels for pigmentation and something about it didn't sit right, that instinct is worth listening to.

Every treatment at Sebastian Rose is delivered or overseen byt GMC or NMC-registered medical professionals holding Level 7 in Aesthetic Medicine, with 24 years of healthcare experience including emergency medicine and over a decade in full-time medical aesthetics. For pigmentation in skin of colour that expertise is not a nicety — it is the difference between a good outcome and a worse problem.

Book a skin consultation and we will assess properly, test where it's warranted, and tell you honestly what can and cannot be changed. Note that we charge £50 for a skin consultation.

Sebastian Rose Medical Aesthetics, 39 Charles Street, Cardiff, CF10 2GB