Searches for melasma vs hyperpigmentation treat them as two rival conditions, but melasma is one type of hyperpigmentation, not its opposite. The real question is which kind you have, because melasma, post-inflammatory marks, and sun spots look similar and respond very differently. This blog walks you through how to tell them apart and why treatment matched to the cause decides whether your skin clears or worsens.
Is melasma a type of hyperpigmentation, or something different?
Melasma is a subtype of hyperpigmentation, not a separate category. Hyperpigmentation is the umbrella term the American Academy of Dermatology uses for any skin darkening caused by excess melanin. Melasma, post-inflammatory hyperpigmentation, and solar lentigines all sit under that umbrella, which is why comparing “melasma versus hyperpigmentation” is really comparing melasma with the other pigmentation types.
That distinction is not pedantic. It changes what you do next. Treating every brown patch as one generic problem is how people end up using the wrong product for months and wondering why nothing shifts.
Melanin is produced by melanocytes, and excess melanin can be triggered by hormones, sunlight, or inflammation. The trigger is what separates the subtypes. A 2026 StatPearls review on melasma stresses that clinicians must differentiate melasma from other facial hyperpigmentation, including PIH and lentigines, using clinical features before treating. The three you will meet most on a Singaporean face are melasma, PIH, and sun spots.
How do you tell melasma from post-inflammatory hyperpigmentation?
Melasma is symmetrical and appears without injury; PIH appears exactly where the skin was previously inflamed. That single rule separates the two most-confused pigmentation types. Melasma forms mirror-image patches across both cheeks, the forehead, and the upper lip. PIH traces the footprint of a past breakout, eczema patch, or cosmetic procedure, so its shape and location follow the original lesion.
The history tells the rest. PIH has a clear precipitating event; melasma builds gradually and flares with sun or hormones. PIH is extremely common in darker skin: acne-induced PIH was reported in 47.4% of Asian patients in one study, and StatPearls notes incidence as high as 65% in darker skin tones after acne. A Singapore study found PIH was more common among Malays and Indians than Chinese, pointing to pigment intensity rather than ethnicity as the driver.
The behaviours differ too. PIH usually fades on its own over months once the inflammation settles, while how melasma is managed assumes it will recur without ongoing control. If your dark spots line up with old marks left by acne, you are likely looking at PIH, not melasma.
How do you tell melasma from sun spots?
Melasma shows up as diffuse symmetrical patches; sun spots appear as separate, well-defined dots. A solar lentigo is a discrete brown macule, usually 1 to 3 cm, with a crisp border, sitting on the highest sun-exposure zones such as the cheekbones, nose, and the backs of the hands. Melasma has soft, blended edges and covers broader areas of the central face.
Age and pattern help. Sun spots accumulate with cumulative UV over years and become near-universal in heavily sun-exposed older skin, affecting up to 90% of fair-skinned people over 60. Melasma concentrates in women of reproductive age, with one multicentre study putting the female share at 97.5%.
Stability is the giveaway. A single spot that has stayed the same for years is far more likely a lentigo than melasma, and sun-driven spots tend to be stable rather than fluctuating. DermNet records solar lentigines as benign and stable, though any spot that changes or develops irregular borders needs assessment to exclude something more serious.
What actually causes each one?
Each subtype has a distinct trigger, and that is the most reliable way to separate them. Melasma is driven by a combination of hormones and UV; oestrogen and progesterone stimulate melanocytes, which is why pregnancy and the oral contraceptive pill set it off. PIH is driven by inflammation, so acne, eczema, and aggressive procedures are the usual causes. Solar lentigines are driven purely by cumulative ultraviolet exposure.
Singapore amplifies all three at once. With a daily UV index the National Environment Agency records at 6 to 9 year-round, sun is a constant input feeding sun spots, darkening melasma, and slowing the fade of PIH. There is no low-UV season here to give pigment a rest.
Understanding the trigger is what connects a brown patch to the wider hyperpigmentation picture and points to the right fix. Worth noting: more than one trigger can operate together, which is how a single face ends up carrying two pigmentation types simultaneously.
How can you tell which type you have?
You can form a strong hypothesis at home by checking four things: symmetry, location, trigger history, and how the marks behave over time. Symmetrical patches across both cheeks and the upper lip point to melasma. Spots that sit where a pimple or rash used to be point to PIH. Discrete, stable dots on sun-exposed skin point to sun spots.
The trigger history is the tie-breaker. A recent pregnancy or a new contraceptive favours melasma; a clear breakout or procedure beforehand favours PIH; decades of sun and an older age favour lentigines. Onset speed helps too: PIH appears within days to weeks of a specific flare, while melasma creeps in gradually over months.
The honest limit is that self-assessment is a hypothesis, not a diagnosis. Pigmentation is hard to read even for specialists. When the Asian Acne Board asked seven dermatologists to grade the same photographs, the panel reported “marked variability between raters” in scoring post-inflammatory hyperpigmentation. If experts disagree across a screen, a mirror at home is a starting point, not the final word.
Does the right diagnosis change the treatment?
The diagnosis changes everything, because melasma and the other types respond on opposite timelines. PIH and sun spots are comparatively forgiving; they respond predictably to tyrosinase inhibitors, and PIH often resolves on its own once the inflammation is controlled. Melasma is chronic and relapsing, so it is treated cautiously and managed long-term rather than cleared once.
The most expensive mistake is treating melasma as if it were a sunspot. The same StatPearls review notes that energy-based procedures can cause relapse or PIH in melasma, particularly with aggressive settings or weak sun protection. A laser that clears a lentigo can deepen melasma in the same session.
First-line treatment reflects this. Topical tyrosinase inhibitors such as azelaic acid, kojic acid, and vitamin C, paired with strict photoprotection, come first for melasma; oral tranexamic acid is a well-evidenced add-on for melasma specifically, while procedures are reserved and used gently. For PIH the priority is different: controlling the source matters as much as fading the mark, because clearing the acne or eczema stops new pigment forming in the first place. Match the plan to the subtype, and the outcome follows.
Conclusion
Melasma is not the alternative to hyperpigmentation; it is one type of it, sitting beside post-inflammatory marks and sun spots. Symmetry, location, and trigger history will usually point you toward the right one, but they form a hypothesis, not a verdict, because the three overlap and melasma punishes the wrong treatment.
If brown patches on your face are not responding, or you are unsure which type you are dealing with, book a pigmentation assessment with Dr Ang Sue-May at Skincodes to confirm the subtype before you treat it.
Frequently asked questions
Can you have melasma and PIH at the same time?
Yes. A single face often carries both, especially in Fitzpatrick skin types III to V common in Singapore. Acne can leave PIH while hormones and sun simultaneously drive melasma across the cheeks. This overlap is exactly why a dermatologist assessment beats self-diagnosis, since each component needs a different treatment emphasis.
Does hyperpigmentation go away on its own?
It depends on the type, which is the point. Post-inflammatory hyperpigmentation often fades over months once the inflammation stops, though it can take a year or more in darker skin. Melasma does not self-resolve; it is chronic and recurs without maintenance and photoprotection. Sun spots persist until treated.
Is melasma harder to treat than other hyperpigmentation?
Yes. Melasma is the most stubborn of the common facial pigmentations, with recurrence rates exceeding 60% within a year when maintenance stops. PIH and solar lentigines respond more predictably to topical tyrosinase inhibitors. This is why dermatologists treat melasma conservatively rather than aggressively.
Brown patches vs dark spots: what’s the difference?
Broad, soft-edged brown patches across the central face usually indicate melasma, while small, well-defined dark spots on sun-exposed skin usually indicate solar lentigines or PIH. The American Academy of Dermatology classes all of them as hyperpigmentation, but the pattern and edges are the quickest visual clue to which subtype you have.
Can melasma turn into PIH, or the other way around?
No, they are separate processes, though they often coexist and get confused. PIH follows inflammation and fades as the skin heals; melasma is driven by hormones and UV and persists for years. Aggressive treatment of melasma can trigger fresh PIH on top of it, which is why correctly matched, gentle treatment matters.