What pigmentation actually is

Pigmentation is your skin doing exactly what it's built to do, just a little too enthusiastically in one spot. Deep in the skin, cells called melanocytes produce melanin, the pigment that gives skin its colour and helps protect it from UV light. When something triggers those cells to overproduce, or to hand off pigment unevenly, you end up with patches that are darker than the skin around them.

The three most common triggers are sun exposure, hormonal changes, and inflammation, including the kind caused by acne, a cut, or irritation from a product that didn't agree with your skin. Once that pigment has been produced, it sits within the skin until your skin's natural renewal process gradually clears it, which is why fading always takes longer than anyone would like. Most dermatology guidance points to a minimum of six to twelve weeks of consistent care before you'd expect to see a meaningful change, and that's with the right approach, not a rushed one.

The three types worth telling apart

Not all pigmentation is the same, and knowing which type you're dealing with changes what actually helps. In short: post-inflammatory hyperpigmentation follows an injury or breakout and can affect any skin tone; melasma tends to appear as symmetrical patches on the cheeks, forehead and upper lip and is closely tied to hormones; and sun spots (or lentigines) are the result of years of cumulative UV exposure. We've written a full guide to spotting the difference, including when it's worth getting a proper diagnosis rather than guessing.

Why irritation makes pigmentation worse, not better

This is the part most brightening routines get backwards. Inflamed or irritated skin produces more melanin as a protective response, which means a routine built around strong acids and high-strength actives can quietly create new marks even while it's trying to fade old ones. The British Skin Foundation's own guidance on melasma makes this point directly: harsh treatments can worsen pigmentation, particularly on skin that's already reactive or sensitive.

That's not an argument for doing nothing. It's an argument for a different order of priorities: protecting the skin barrier and avoiding irritation isn't a gentler alternative to treating pigmentation, it's part of how pigmentation actually improves. We've gone into this properly in our piece on brightening sensitive skin without the backlash.

Sun protection is non-negotiable

Every dermatology body we've come across agrees on this one point without exception: unprotected UV exposure is the single biggest reason pigmentation appears, worsens, and comes back after it's faded. That's true whether you're dealing with melasma, sun spots, or marks left behind from a breakout. We cover the UK-specific detail, including the cloudy-day myth, in its own post.

Where to start

If you're newer to this, start with working out which type of pigmentation you actually have, then build from there: a barrier-first routine, consistent daily SPF, and patience with the timeline. Our Brighten + Refresh Under Eye Oil was formulated with exactly this approach in mind, for the area of the face where skin is thinnest and irritation shows up fastest.

FAQs

How long does it take to fade pigmentation?

Most dermatology guidance suggests a minimum of six to twelve weeks of consistent care, in line with your skin's natural renewal cycle. Melasma in particular can take longer and may need ongoing management rather than a one-off fix.

Can pigmentation come back after it's faded?

Yes, particularly melasma, which is closely linked to hormones and UV exposure. Many people find it recurs with sun exposure, pregnancy, or hormonal changes, which is why daily sun protection matters even once marks have improved.

Is pigmentation the same for every skin tone?

No. It can appear differently and last longer on deeper skin tones, and darker skin is generally more prone to post-inflammatory hyperpigmentation from irritation. This is one of the reasons a gentle, personalised approach matters more than a one-size-fits-all routine.

Research & further reading

•     British Skin Foundation — Melasma: britishskinfoundation.org.uk/conditions/melasma

•     British Skin Foundation — Navigating melasma in darker skin and menopausal skin: britishskinfoundation.org.uk/resources/navigating-melasma-a-guide-for-women-of-colour-and-menopausal-skin

•     British Association of Dermatologists — Melasma patient information leaflet: bad.org.uk/pils/melasma

•     Changing Faces — What is hyperpigmentation: changingfaces.org.uk/advice-guidance/condition-specific-information/hyperpigmentation