Pigmentation responds well to the right interventions and very badly to impatience. The skin makes melanin to defend itself from UV, hormonal cues, and inflammation. Once made, melanin sits in the skin's upper layers until those cells slowly turn over. Months, not weeks.
The good news is that the foundations are universal. The right interventions on top of those foundations differ depending on which kind of pigmentation you have.
The three patterns to recognise
Post-inflammatory hyperpigmentation (PIH) is a flat dark mark left behind after a blemish, a scratch, or any inflamed lesion. It is the most common form of pigmentation in deeper skin tones. PIH fades on its own over months, faster with consistent active use.
Sun-induced pigmentation includes the small flat spots on cheeks, hands, and chest that appear with cumulative UV exposure. They tend to deepen on sun days and lighten on cloudy weeks; over years, they become permanent fixtures unless addressed.
Melasma is a particular pattern of larger, irregular patches usually on the upper cheeks, forehead, and upper lip. It is hormonally and UV-driven, common during pregnancy and on hormonal contraception, and notoriously stubborn. Melasma responds to skincare but requires more patience and stricter sun discipline than the other two.
Freckles are different again: a genetic, light-driven pattern that comes and goes with sun exposure and does not require treatment.
The foundations that apply to all three
Daily broad-spectrum SPF 30 or higher, reapplied through any sun exposure, is the single most important intervention for any pigmentation. Without it, the actives below are working against ongoing pigment production. SPF is not optional for pigmentation; it is the prerequisite.
Avoiding picking, scrubbing, and aggressive procedures that inflame the skin. Inflammation drives melanin in pigmentation-prone skin. The gentler the rest of the routine, the better the actives perform.
The actives with the strongest evidence
Vitamin C at 10 to 20 percent (L-ascorbic acid) reduces pigmentation by inhibiting the enzyme tyrosinase, central to melanin production. Best applied in the morning under SPF. Effects appear over eight to twelve weeks.
Niacinamide at 4 to 5 percent slows the transfer of melanin from where it is made to the upper skin cells where it is seen. Well tolerated, easy to layer, modest effect on its own and useful in combination.
Retinoids speed cell turnover, which clears pigmented cells from view. They also support the structural improvements that make pigmented skin look more uniform overall. Adapalene, retinol, or prescription tretinoin, depending on tolerance.
Azelaic acid at 10 to 20 percent is one of the best-tolerated pigmentation actives, including in pregnancy. It addresses both pigment and the underlying inflammation in PIH. Worth its own article (we have one).
Tranexamic acid, oral or topical, has strong evidence in melasma specifically. Topical formulas at 2 to 5 percent are widely available; oral use is a clinician conversation.
Hydroquinone is the dermatology gold-standard for stubborn pigmentation. Prescription in most regions, generally for short cycles (8 to 12 weeks) with breaks. Effective and worth asking about for resistant cases.
What does not work
Lemon juice. Aggressive at-home scrubs. Single-use peels marketed for "fading dark spots" without any of the actives above. Spot-treating one mark while not addressing UV exposure (the spot will fade and a new one will appear).
A sensible routine
Morning: gentle cleanser, vitamin C serum, moisturiser, SPF 30 or higher.
Evening: gentle cleanser, retinoid or azelaic acid (alternating if both), moisturiser. Consider adding tranexamic acid or niacinamide if melasma or stubborn PIH is your concern.
Hold this routine for at least twelve weeks before judging it. Improvements show first on tone uniformity and only later on the individual dark spots.
Pigmentation is a marathon, and SPF is the route. Every active above is wasted if the sun keeps writing new pigment over what the routine is fading.
When to involve a dermatologist
Persistent melasma. Pigmentation that has not visibly improved after six months of a complete routine. Sudden new pigmentation patterns. Pigmentation that is irregular in shape, asymmetric, or changing in colour (always a medical question, never a cosmetic one).
Key takeaways
- Three main patterns: PIH, sun-induced, and melasma. Each responds, with different timelines.
- Daily broad-spectrum SPF is the prerequisite. Skip it, and the routine fails.
- Vitamin C, niacinamide, retinoids, azelaic acid, and tranexamic acid are the actives with the strongest evidence.
- Give a routine three months minimum. Stubborn pigmentation can take six.
- For resistant cases, prescription options (hydroquinone, in-clinic procedures) exist and work.
Common questions
Why is my pigmentation worse in summer?
UV is the strongest driver of pigment production. Even cloudy days carry enough UV to undo recent fading. Reapplication of SPF on sunny days is essential.
Can I treat pigmentation in pregnancy?
Yes, with limits. Avoid retinoids and hydroquinone. Azelaic acid, niacinamide, and SPF are typically acceptable. Confirm with your clinician.
How long until pigmentation fades?
PIH: three to six months on average. Sun spots: four to twelve months. Melasma: improvement begins around twelve weeks; maintenance is ongoing.
Will exfoliation speed this up?
Gentle, consistent exfoliation supports cell turnover. Aggressive exfoliation causes inflammation and worsens pigmentation. Once or twice a week with a mild acid is plenty.
Cura is informational and not a substitute for medical advice. New, changing, or asymmetric pigmented spots warrant prompt review by a dermatologist.