Melasma or sun spots in Busan Seomyeon, and why the treatments are opposites.

This is the distinction that decides whether pigment treatment works or backfires. Getting it wrong is the single most common story we hear from patients arriving after treatment elsewhere, and it is avoidable in one assessment.

What sun spots are

Discrete, well-defined patches of increased melanin at the epidermal level, produced by cumulative UV exposure — solar lentigines. They have clear borders, sit where sun exposure has been heaviest, and appear individually rather than symmetrically. Because the pigment is superficial and localised, energy delivered to it clears the spot efficiently, often within three to five sessions of toning.

What melasma is

A chronic condition rather than a mark, driven by hormones, heat and UV together. It presents as symmetrical, blotchy patches with indistinct borders across the cheeks, forehead and upper lip, and the pigment sits deeper and involves an inflammatory component. It waxes and wanes with hormonal state and season, and it does not clear permanently — it is managed.

How to tell them apart

Three features. Borders: sharp for sun spots, hazy for melasma. Symmetry: sun spots appear independently on each side, melasma is usually mirrored. And history: sun spots accumulate slowly and stay, melasma appears in a defined period — often pregnancy or after starting hormonal medication — and fluctuates. Most patients over forty have both, in different areas of the same face.

Why does high energy work on one and not the other?

Because melasma responds to heat and inflammation by producing more pigment. A setting that safely destroys a lentigo delivers exactly the thermal insult that provokes a melasma rebound — the patch lightens for a fortnight and returns darker and often wider. This is the mechanism behind almost every case of pigment treatment that appeared to fail, and it is why the protocols are opposites.

What actually treats melasma?

Low-fluence toning across eight to fifteen sessions, deliberately gentle, alongside topical therapy and absolute strictness with sun protection including visible light. The goal is control rather than clearance, and sessions are spaced to let any inflammation resolve entirely. Progress is slow by design — a course that shows dramatic change in three sessions is being run at settings that will rebound.

What treats sun spots?

Higher energy delivered precisely, which clears them faster. Three to five sessions of pico toning handles most, and individual stubborn lentigines can be treated at a spot setting. The spot typically darkens and crusts for several days before flaking away, which patients should expect rather than be alarmed by.

Why is this misdiagnosed so often?

Because the assessment takes a moment and skipping it is invisible until week four. A brown patch on a cheek looks like a brown patch, and a clinic working to a schedule can treat it at standard settings, watch it lighten, and book the next session — with the rebound arriving after the patient has already paid for a course. Nothing dishonest has to occur for this to happen; it follows from not typing the pigment before choosing the energy. Asking which of the two you are being treated for, and at what fluence, is the question that prevents it anywhere.

Where does pigment work sit alongside everything else?

Usually first in a skin plan and last in a facial one. Uneven tone reads as tired more reliably than lines do, so clearing it changes how a face photographs before any structural work happens — and it also reveals how much texture is genuinely there, since patchy colour exaggerates surface irregularity. What it does not touch is volume, movement or laxity, so filler, botox and lifting remain separate questions. Where the skin is also thin or depleted, boosters pair well with a toning course and support recovery between sessions.

What if I have both?

The plan runs at melasma settings, which is the constraint. Treating sun spots aggressively on a face that also has melasma provokes the melasma even in untreated areas, since heat spreads. That means the lentigines clear more slowly than they would on a face without melasma — a genuine trade, stated at consultation rather than discovered at session four.

Why does season matter so much here?

Because both drivers of melasma peak together in a Korean summer. UV is high, ambient heat is high, and compliance with sun protection is hardest. Summer treatment holds ground rather than making progress; autumn and winter is when the course advances — see winter: the safest window. Sun spots are less season-dependent, though recent tanning postpones treatment for either.

What should I expect realistically?

Sun spots: substantial clearance, with new ones appearing over years if sun exposure continues. Melasma: meaningful lightening over a course, ongoing maintenance, and recurrence with pregnancy, heat or a summer of poor protection. Being told that melasma is managed rather than cured is not pessimism — it is what allows a plan to be judged fairly — see PIH risk on Asian skin.