Laser toning at Gangnam Station dermatology clinics uses a Q-switched laser to break melanin into small particles.
Wavelength and session numbers depend on whether pigment lies in the epidermis or dermis, so treatment often does not end after one session.
Results vary with pigment type and skin condition, making consultation-based planning important.
➊How does laser toning remove pigment? A Gangnam Station dermatology perspective
StarWalker toning is one of the treatments most frequently asked about by people seeking a dermatologist near Gangnam Station.
A Q-switched Nd:YAG laser delivers brief, intense energy to fragment melanin granules. It selectively targets pigment granules inside cells rather than melanocytes themselves, and is understood to place less burden on normal tissue. The fragments are gradually cleared over days to weeks.
1064nm is mainly used for deeper dermal pigment, melasma and overall tone; 532nm for light epidermal spots or freckles.
Selecting wavelength by pigment depth, even on the same device, is central to clinical care.
➋Why do spots and melasma respond differently to the same laser?
Epidermal age spots and other dark spots are shallow and sharply defined, often showing visible change in 1 or 2 sessions.
Melasma is increasingly understood as a chronic pigment condition involving dermal vascular factors as well as pigment itself.
| Category | Spots/freckles (epidermal) | Melasma (dermal/mixed) |
|---|---|---|
| Pigment location | Mainly epidermal, clear borders | Includes dermis; blurred borders, possible vascular component |
| Main wavelength | Mainly 532nm | Mainly low-energy 1064nm |
| Treatment method | Irradiation to immediate whitening | Repeated sessions aiming for mild erythema |
| Typical course | Relatively stable after improvement | Prone to darkening again after fading |
Even with the same device, spots call for a more definitive single treatment, while melasma requires a cautious, repeated strategy.
Ignoring this distinction and using spot-removal settings for melasma can cause rebound darkening or hypopigmentation.
“Melasma is not finished simply by removing pigment; it is a chronic condition requiring ongoing recurrence management.”
➌How many sessions do I need? Criteria for planning
The number depends on pigment type and depth.
Epidermal spots may need only 1 or 2 sessions, whereas melasma or dermal pigment is usually treated over multiple sessions at 1–2-week intervals.
Reports suggest excessively frequent treatment increases the risk of pale spots, making interval management itself important to the outcome.
I emphasize that we do not decide by looking at pigment alone.
We also assess vascular involvement and the recent speed of spreading to plan wavelength, energy and expected sessions.
- ✓Epidermal spots: concentrated treatment over fewer sessions
- ✓Melasma/dermal pigment: repeated low-energy treatment
- ✓Mixed: select different wavelengths according to the goal
➍When can I notice a change?
Epidermal pigment often forms a light crust after treatment and becomes noticeably lighter relatively quickly as it sheds.
Melasma and overall tone improve gradually as sessions accumulate, so maintaining the planned interval matters even when interim changes are small.
| Timing | Epidermal spots | Melasma/tone improvement |
|---|---|---|
| Immediately after treatment | Temporary whitening, fine crusts | Mild erythema |
| 1–2 weeks | Crusts shed, pigment lightens | Change may be minimal |
| After several sessions | Few additional sessions may be needed | Gradual improvement; maintenance needed |
Melasma frequently recurs. Continued sun protection and maintenance after the course, rather than viewing it as finished, help preserve results.
➎An honest look at adverse effects and precautions
The most common reactions are temporary redness, slight swelling and stinging, usually settling within a day.
Post-inflammatory pigmentation can rarely occur, with higher risk in darker skin or when energy is excessive.
The greatest concern is mottled hypopigmentation after overly frequent repetition, which often takes a long time to recover.
I therefore allow adequate intervals and, if pigment temporarily darkens, lengthen the interval or pause rather than pushing ahead.
Fine hair in the treatment area may temporarily lighten. People with herpes simplex must inform us beforehand because reactivation is possible.
➏Who is suitable, and who should postpone?
People with sharply defined epidermal spots or freckles, or stable melasma without rapid spreading who can maintain regular care, may expect tone improvement over several sessions.
If pigment is spreading rapidly, there is a history of hypopigmentation, or hormonal changes are substantial during pregnancy or breastfeeding, I first recommend topical medication or stronger sun protection rather than laser.
More sessions do not produce proportionately better results; excessive repetition may only raise hypopigmentation risk, so I plan only what is needed.
The next step considers depth, vascular involvement and the recent rate of change together (individual results vary).
“Laser treatment for melasma is not a promise of a permanent cure; it is a process of managing recurrence and skin tone.”
QFrequently asked questions
Light epidermal spots can show visible change after 1 or 2 sessions.
Dermal melasma often needs repeated sessions, with individual variation in the number.
Melasma is a chronic pigment disorder with a strong tendency to recur.
Low energy selectively fragments pigment granules, producing gradual fading over multiple sessions.
Excessively frequent repetition has been reported to increase hypopigmentation risk.
Intervals are generally 1–2 weeks or longer, with the exact schedule decided after assessment.
Temporary redness, swelling and stinging may occur, mostly settling within a day.
Post-inflammatory pigmentation or mottled hypopigmentation may rarely occur.
We first assess whether pigment is epidermal or dermal and whether vascular factors are involved.
Wavelength, energy and expected sessions follow that assessment; the actual plan is explained after examination (results vary).
References
- Wattanakrai P, et al. Low-fluence Q-switched neodymium-doped yttrium aluminum garnet laser for melasma, split-face RCT, 2010
- Kang HY, et al. Changes in Melanin and Melanocytes in Mottled Hypopigmentation after Low-Fluence 1,064-nm Q-Switched Nd:YAG Laser Treatment for Melasma, 2015
- Kim JE, et al. The Asian Problem of Frequent Laser Toning for Melasma, 2017
It is closer to sending repeated signals that help the skin clear pigment itself than simply erasing pigment.
Laser toning does not treat spots and melasma identically; wavelength and sessions are designed around pigment depth and characteristics.
When consulting a dermatologist near Gangnam Station, I recommend asking about this planning process.
If you want to know your pigment type and likely session number, an examination at LUNN Clinic can help.
Dr. Park Hyungkwon, Director and Dermatologist at LUNN Clinic
Under Article 56 of the Medical Service Act, we disclose possible adverse effects including redness, swelling and, rarely, post-inflammatory pigmentation or mottled hypopigmentation.
Treatment and procedure results may vary depending on the individual’s condition.
This column is intended to provide medical information.
