Melasma vs. Dark Spots — Why Aggressive Removal Can Make Them Darker

Melasma vs. Dark Spots — Why Aggressive Removal Can Make Them Darker

Last Friday evening,

a friend I hadn't seen in a while pointed to some pigmentation on her cheekbones and said,

"I've had five laser toning sessions for this,

but it honestly looks even darker than before."

Another friend standing nearby tilted her head and said,

"Really? I had mine all removed in one shot, like a mole removal."

They both looked like ordinary brown spots —

so why does treatment clear it up for some people,

while others find it getting darker the more they try?

What Exactly Is the Difference Between Melasma and Dark Spots?

Dark spots are benign lesions where pigment has clustered together, while melasma is a chronic condition in which the melanocytes themselves are overactivated.

"Dark spots" is a general term that covers freckles, age spots, and solar lentigines.

They form when cumulative UV exposure causes

epidermal melanin to cluster into defined spots.

Melasma, on the other hand, is not simply a clump of pigment.

It's a state in which the melanocytes —

the cells responsible for producing melanin — are chronically overactivated.

Hormones, UV exposure, heat, and micro-inflammation

continuously send stimulating signals to these cells,

which means even if the pigment is removed, it keeps getting reproduced.

Why Does Aggressive Treatment Make Melasma Darker?

I see this scenario so often that I want to document it separately.

Just a few days ago, a friend sent me a photo over text

and asked me about it.

"My local dermatologist said it was melasma,

so they hit it hard with a laser in one session —

and a month later it's gotten even darker. Why is that?"

This is one of the most common pitfalls in melasma treatment.

When melanocytes are stimulated,

they respond defensively by producing even more pigment.

When you apply high energy to break them down all at once,

the cells register it as an "attack"

and dramatically ramp up melanin production in response.

This is called post-inflammatory hyperpigmentation (PIH).

That's why the correct approach to melasma isn't to "remove" the pigment —

it's to "calm" it down.

Low-energy laser toning performed at 4-week intervals,

accumulated over 5 to 10 sessions, is needed

to actually reduce the activity level of the melanocytes themselves.

This is typically combined with tranexamic acid,

either taken orally or administered via microinjection.

It's a medication that blocks the inflammatory signaling

transmitted from blood vessels to melanocytes —

and a growing body of evidence suggests that consistent use

over 3 or more months can cut the recurrence rate by nearly half.

Topical hydroquinone 4% is also used,

as it directly inhibits the enzyme responsible for melanin synthesis.

It's typically applied only at night for around 8 to 12 weeks.

However, long-term use can paradoxically cause pigmentation abnormalities,

so scheduled rest periods — where you stop and then resume — are essential.

Melasma vs. Dark Spots — Which Procedure Is Right for You?

I've put together a table to make this easy to reference.

The most dangerous scenario is

having melasma but assuming it's just dark spots,

then blasting it with a high-intensity laser.

Dermal-type and mixed-type melasma in particular

can be very difficult to distinguish from dark spots with the naked eye.

If the edges of the discoloration are blurry

and it spreads symmetrically across both cheekbones,

you should suspect melasma before assuming it's a simple dark spot.

Melasma and Dark Spots — 3 Questions I Hear Every Day in the Clinic

Q1. How can I tell if it's melasma or a dark spot?

A. This is the question patients find most confusing —

and statistically, about seven out of ten people who come in for the first time have misidentified their own pigmentation.

Melasma gets mistaken for freckles, age spots get mistaken for melasma — it happens constantly.

Clinically, if the pigmentation spreads symmetrically across both cheekbones with blurry borders, it's almost always melasma.

If it sits on one side as a clearly defined spot, it's more likely a dark spot.

For an accurate assessment, including depth, a Wood's lamp or dermatoscope examination is necessary.

Once patients understand that, there's usually a follow-up question that comes to mind.

Q2. How many laser toning sessions do I need before I see results?

A. Just this week alone, three different patients asked me this exact question.

One of them came in after having three sessions elsewhere with no improvement —

and when I looked into it, the sessions had been spaced only 2 weeks apart.

The melanocytes simply weren't given enough time to settle down.

Many patients see minimal change through the first 5 sessions at 4-week intervals, and then notice their tone evening out from session 6 to 8 onward.

It helps to let go of the expectation that it'll be resolved in one go.

And finally — this is one point you really don't want to skip over.

Q3. Do I need to be careful about sun exposure while getting laser toning?

A. Honestly, early on I thought it was mostly about getting the procedure done right.

But after accumulating enough clinical experience, I've come to see that sun protection carries even more weight than the procedure itself.

Even after toning calms the melanocytes down, a single significant UV exposure can wake them right back up.

Patients who skip sunscreen consistently show a recurrence rate nearly double that of those who don't —

which is why I always recommend SPF 50 or higher, reapplied every two to three hours.

A stronger hand isn't a better hand when it comes to pigmentation. The better approach is one that doesn't provoke the melanocytes in the first place.


In the next post, I'll break down why the toning interval is set at 4 weeks — and why 2 or 3 weeks simply doesn't work — by walking through the cellular recovery cycle. The same procedure can yield very different outcomes depending on timing. This has been Dr. Wi Young-jin.