Part of our guide to Skincare Routines and Results.
Hyperpigmentation is the umbrella term. Dark spots are individual marks within it, usually left by acne or by sun exposure. Melasma is a specific type: large symmetrical patches driven by hormones and worsened by sun and heat. All melasma is hyperpigmentation. Most hyperpigmentation is not melasma, and the difference decides how you treat it.
How to tell which one you have
| Post acne marks | Sun spots | Melasma | |
|---|---|---|---|
| Shape | Discrete marks where skin was injured | Individual spots, well defined | Large patches, irregular borders |
| Pattern | Random, matches old breakouts | Random, on sun exposed areas | Symmetrical, mirrored on both sides |
| Colour | Brown, red or purple | Tan to dark brown | Brown to grey brown |
| Cause | Inflammation | Accumulated UV | Hormones, worsened by UV and heat |
| Fades on its own? | Often, slowly | No | Sometimes after pregnancy, often not |
| Responds to treatment | Well | Well | Slowly, and tends to recur |
The quickest test is symmetry. Melasma mirrors itself across the face, typically on the cheeks, forehead and upper lip. Dark spots don't. If what you're looking at is a matched pair of patches rather than scattered marks, treat it as melasma until a professional says otherwise.
Dark spots: what they are
Two things get called dark spots, and they have different causes.
Post acne marks. Left behind after a breakout, a bite, a scratch or any inflammation. They sit exactly where the injury was, with edges matching it, and they're flat rather than raised. They're more pronounced on deeper skin tones and more common in humid climates where breakouts are more frequent.
Sun spots. The result of accumulated UV exposure rather than any single event. Tan to dark brown, well defined, on the face, hands and anywhere else routinely uncovered. Living near the equator means these arrive earlier than they would in a temperate climate.
Freckles are a third category and generally genetic rather than a concern to treat.
Both respond well to brightening actives, which is the good news in this article. Our guide to Alpha Arbutin, vitamin C and niacinamide covers which does what.
Melasma: why it behaves differently
Melasma is hormonal at root. Pregnancy, hormonal contraception and thyroid changes are the usual triggers, and it affects women far more often than men, typically appearing between the twenties and forties.
Three things make it harder to shift. It often sits deeper in the skin than surface pigmentation does, which puts it partly beyond the reach of topical actives. Its trigger is internal, so you can't simply avoid it the way you can avoid sun. And it's easily reactivated, by brief sun exposure and by heat alone, which in this climate is difficult to avoid entirely.
Realistic framing matters here. Melasma is managed rather than cured, it responds over many months rather than weeks, and recurrence is normal rather than a sign that treatment failed. That isn't defeatism. It's the difference between a routine you stick with and one you abandon at week six.
If you suspect melasma, see a dermatologist rather than working through it alone. Prescription options and in clinic treatments exist precisely for this.
What actually fades pigmentation
Sun protection first, and this isn't a formality. UV triggers melanin production directly, so without daily SPF you're making new pigment faster than any active can clear the old. We don't sell sunscreen, so take that as disinterested advice.
Then the actives. Alpha Arbutin inhibits tyrosinase, blocking melanin at the source, and suits post acne marks particularly well. Niacinamide stops melanin already made from reaching surface cells, and strengthens the barrier while it does. Vitamin C does some of both and adds antioxidant protection, though its form matters more than its percentage.
Tranexamic acid and azelaic acid turn up in melasma treatment, mostly through a dermatologist and often on prescription, which is where we'd send you if your patches are symmetrical. Kojic acid also lightens pigment, though unlike alpha arbutin it sensitises a fair number of people.
Combining mechanisms beats increasing the strength of any one. ILLUMINATE pairs Alpha Arbutin, Niacinamide at 5% and vitamin C as Magnesium Ascorbyl Phosphate, reducing melanin production by 25% in independent laboratory tests.
How long it takes
Most people see meaningful brightening by 6 to 8 weeks, with best results at 12.
Pigment sits in cells that have to cycle out before you can see them go, which is why nothing happens in month one and why skin renewal speed sets the pace. Our guide to what to expect in your first 12 weeks sets out the stages.
Melasma runs slower than that, and it's fair to expect several months before meaningful change, with maintenance continuing afterwards.
Newer marks fade faster than older ones. If some of your spots respond and others don't, that's usually age rather than a failing product.
What makes it worse
Picking at breakouts, which converts a temporary blemish into a mark that lasts months.
Over exfoliating, which is the most common self inflicted version of this problem. Inflammation triggers pigmentation, so scrubbing harder at dark spots produces more of them. Our guide to exfoliation after 40 covers how often is enough.
Skipping sunscreen, starting several actives at once, and giving up before 12 weeks round out the list.
Heat deserves its own mention for melasma. It darkens without any UV involved, which means cooking over a stove and prolonged time outdoors both count.
The climate factor
Sitting one degree off the equator means UV stays high all year, with no low season and no month where sunscreen is optional. Cloud cover fools people: an overcast afternoon still carries enough UV to drive pigment production.
Humidity contributes indirectly, by increasing breakouts and therefore the marks they leave. And the constant move between humid outdoor air and dry air conditioning stresses the barrier, which makes skin more reactive and more prone to pigmenting after irritation.
Our piece on skincare in Singapore's humidity goes through what to change in response.
A routine that addresses it
Morning: PURIFY, then MERACLE, then ILLUMINATE, then SATURATE, then sunscreen.
Evening: the same without the sunscreen.
Keeping the barrier intact matters as much as the actives, because inflammation creates the pigmentation you're trying to remove. A cleanser that strips is working against the serum that follows it.
When to see a dermatologist
If a spot appears suddenly, changes in size, shape or colour, or looks different from everything else on your skin, that's a medical question and worth asking promptly.
Also worth professional input: suspected melasma, pigmentation that hasn't moved after 12 weeks of consistent treatment, and anything affecting how you feel about yourself enough that it's worth more than a serum.
Questions we get asked
What is the difference between dark spots, hyperpigmentation and melasma? Hyperpigmentation is the umbrella term for excess melanin in the skin. Dark spots are individual marks within it, usually left by acne or sun exposure. Melasma is a specific type: large symmetrical patches driven by hormones and worsened by sun and heat.
How do I know if I have melasma or dark spots? Symmetry is the quickest test. Melasma mirrors itself across the face in large patches, typically on the cheeks, forehead and upper lip. Dark spots are scattered and irregular.
Can pigmentation be removed completely? Post acne marks and sun spots often fade substantially with consistent treatment and daily sun protection. Melasma is managed rather than removed, and partial lightening is a genuine result.
How long does it take to fade dark spots? Most people see meaningful brightening by 6 to 8 weeks, with best results at 12. Melasma runs slower and can take several months before meaningful change.
Is brightening skincare safe during pregnancy? Alpha Arbutin, niacinamide and vitamin C are generally considered safe during pregnancy, while retinoids and hydroquinone are not. This matters because pregnancy itself is a common melasma trigger.
Are brightening actives safe for deeper skin tones? Alpha Arbutin, niacinamide and vitamin C are. What needs care is aggressive treatment, since harsh peels and poorly chosen laser settings can cause darkening rather than fading.
Why do some dark spots fade while others do not? Usually age. Newer marks respond faster than older ones, and pigmentation sitting deeper in the skin is harder to reach with topical actives than surface pigmentation.
Where to go from here
Look in a mirror in natural light and check for symmetry first. That single question separates the treatable from the manageable, and it changes what you should expect.
If it's scattered marks, a brightening routine and daily sunscreen will do the work over 12 weeks. Brightening and dark spots is where ours live.