Three kinds of dark mark, and why one facial cannot fix all three

Almost everyone who books here for pigmentation arrives with a product that did not work. Usually a brightening serum, sometimes a hydroquinone cream bought without guidance, occasionally the aftermath of a peel somewhere else that left the marks darker than before. The product is rarely the problem. The problem is that three different conditions produce brown patches on a face, they look similar enough to confuse, and the treatment that clears one can visibly worsen another.

So before choosing a treatment, it is worth working out which one you actually have. KIAMO offers hyperpigmentation treatment across San Diego neighborhoods from the Mission Hills studio, with protocols calibrated for each presentation.

What are the three kinds of hyperpigmentation?

The three most common are post-inflammatory hyperpigmentation, which is a mark left behind after a spot or an injury; melasma, which is a hormonal and light-driven pattern of larger symmetrical patches; and sun damage, which is scattered flat spots in the places light hits most. They differ in what triggers them, how deep the pigment sits, and how much a facial can realistically change.

If more than one row describes your face, that is normal. Mixed presentations are common, which is exactly why a single treatment applied to everything tends to disappoint.

How do you know if it is post-inflammatory hyperpigmentation?

Post-inflammatory hyperpigmentation is a flat brown or grey mark sitting exactly where a spot, ingrown hair or scratch used to be. If you can trace each mark back to something that was once inflamed, that is what it is.

This is the most common form in melanin-rich skin by a wide margin. In one study cited in the Journal of Clinical and Aesthetic Dermatology review of PIH in skin of color, 65.3% of African-American patients with acne developed post-inflammatory marks, against 52.7% of Hispanic and 47.4% of Asian patients. The mechanism is not mysterious: inflammation signals pigment cells to overproduce, and the more active those cells are to begin with, the more pigment gets left behind.

Depth decides the timeline. The same review notes that epidermal pigment — the tan to dark brown kind — may take months to years to resolve without treatment, while deeper dermal pigment, which reads blue-grey, may be permanent or resolve only over a protracted period. The American Academy of Dermatology puts a number on the shallower version: a spot a few shades darker than your natural skin tone usually fades within 6 to 12 months, and fading can take years when the colour lies deep.

The important consequence: if acne is still active, treating the marks is treating the symptom. Every new spot deposits a new mark. Clearing the acne comes first, and here that usually means barrier and congestion work rather than anything aggressive.

How is melasma different from other hyperpigmentation?

Melasma appears as larger patches with soft edges, usually roughly mirrored on both sides of the face, and it is driven by hormones together with light and heat rather than by a single injury. It is the one form that is managed long-term rather than cured, and it is the one most likely to worsen if treated too aggressively.

The clinical literature is direct about this. StatPearls describes melasma as "a chronic, relapsing pigmentary disorder" best understood as "chronic disease control rather than cure", noting that improvements are "frequently transient in the absence of sustained photoprotection and maintenance therapy". Anyone promising to erase melasma permanently is describing something the evidence does not support.

The part most people have never been told is that visible light matters, not only UV. StatPearls notes that visible light, particularly short-wavelength blue light, "has emerged as a clinically significant contributor, especially in individuals with darker skin phototypes", and that the pigmentation it induces "may be more intense and longer-lasting than UV-induced pigmentation". A clear sunscreen, however high the SPF, does very little about visible light.

This is where tinted sunscreen stops being a cosmetic preference. In a randomised investigator-blinded trial of 42 women with melasma applying sunscreen twice daily across five months of summer, both a tinted iron-oxide formula and an untinted one with matched UV protection prevented sun-induced darkening. But only the tinted group significantly reduced the colour gap between the melasma patches and the surrounding skin. The AAD gives the same advice in plainer terms: use tinted sunscreen with iron oxide, because iron oxide protects against visible light.

Why does melanin-rich skin need a different approach?

Melanin-rich skin produces pigment as its response to injury, so any treatment aggressive enough to inflame the skin can create the exact problem it was meant to solve. The treatment plan has to be slower and gentler than the one used on lighter skin, not because it is more fragile, but because its repair response is more pigmenting.

This is the mechanism behind every story that starts "I had a peel once and it made my dark spots worse". It is also measurable. A systematic review of PIH treatment in skin of colour found that chemical peels accounted for 20% of trauma-induced PIH cases in its dataset, and that after two weeks of salicylic acid peels, 40% of patients showed new hyperpigmentation. The same review concluded that peels "should not be routinely recommended as a first-line treatment in this demographic but may have merit in refractory cases".

That finding is worth sitting with, because it cuts against how pigmentation is usually sold. It does not mean peels have no place. It means the sequence matters: the review lists risk mitigation as "pre- or posttreatment regimens, starting with lower concentrations, and emphasizing sun protection" — which is a description of a prepared, escalating series rather than one strong session.

It is also why peels here are run as a series with home prep between visits, why strength escalates across the series rather than within a single appointment, and why the first appointment is often spent on preparation rather than on acid.

What does a facial for hyperpigmentation actually do?

A professional facial can accelerate the fading of pigment that has already formed, and can improve the surface texture and barrier function that make marks look worse. It cannot stop new pigment forming, which is why daily light protection does more of the work than any treatment in the room.

Set expectations against a genuinely sobering statistic. In that same systematic review, untreated patients showed 62% partial pigment reduction on their own, and treated patients using peels showed 67%. The authors are careful to note that apparent gains may partly reflect spontaneous fading. Professional treatment is worth having — but it is an accelerant applied to a process that is already slow, not a switch.

What the treatments do, honestly stated:

• —Enzyme therapy works on barrier function and circulation. Most useful where inflammation and congestion are still generating new marks.
• —HydraFacial cleanses, exfoliates and hydrates in one pass. Good maintenance and good preparation; not a corrective pigment treatment on its own.
• —Lira peels are the corrective option for pigmentation, run as a prepared series at escalating strength rather than as a single strong session.
• —Dermaplaning clears the surface layer between peel appointments, improving serum absorption without chemical exposure — useful when the marks are fading and the skin needs maintenance.
• —Procell microchanneling works without heat or light, which matters here because heat is itself a pigment trigger in melanin-rich skin. Better suited to texture and scarring than to melasma.

Notice what is absent. No lasers, no IPL, no prescriptions — this is an esthetician studio, not a medical practice. For dermal melasma or anything needing prescription-strength intervention, a dermatologist is the right referral, and saying so is more useful than selling a series that will not reach the depth involved.

Does San Diego make pigmentation harder to treat?

Yes, in one specific and under-appreciated way: the overcast mornings feel like sun protection and are not. Cloud cover removes the warmth that people use to judge risk while letting a large share of ultraviolet through.

McGill University's Office for Science and Society notes that on an overcast day up to 80% of the sun's UV rays can still reach your skin, and that people "mistakenly associate UV exposure with temperature and cloud cover" — which produces more sunburn on cool, grey days, not fewer. UVA in particular accounts for 90–99% of the UV reaching the ground and is the fraction least affected by cloud.

May Gray and June Gloom therefore arrive as a pigmentation problem dressed as weather. The sky goes white, the sunscreen comes off the counter, and six weeks of careful correction quietly reverses. Add the visible-light component that drives melasma and a bright overcast morning supplies almost everything pigment cells respond to, while feeling like none of it. The pattern is especially common along the boardwalk — facials for Pacific Beach clients are built around exactly this mechanism.

Car windows are the other local blind spot. Glass filters UVB well and UVA poorly, so a daily commute is meaningful exposure on the driving side of the face. If your pigmentation is noticeably worse on one side, that is usually the explanation. Inland commuters from across the county face higher cumulative UV year-round—Chula Vista and La Mesa sit past the marine layer that keeps coastal areas gray through May and June, which is why melasma is the most common concern from those inland areas.

The longer piece on the marine layer covers this in more detail.

What should you do first?

Start by identifying which kind of mark you have, because that decides everything after it. If acne is still active, treat that first; if the pattern is symmetrical and hormonal, build the plan around light protection before booking any resurfacing.

A reasonable order of operations, whether or not you ever book a treatment:

• —Work out which of the three you have, using the table above. Bring the answer to any consultation.
• —If spots are still forming, treat the acne before treating the marks.
• —Wear broad-spectrum SPF 30 or higher every day, and use enough of it — roughly two finger-lengths for face and neck.
• —If the pattern looks like melasma, make it a tinted sunscreen with iron oxides.
• —Treat a commute as sun exposure.
• —Expect months, not weeks. Anything promising faster is describing a different condition than the one you have.

None of that is dramatic, and that is the point. The treatments accelerate a process; the daily protection decides whether the result holds.