The same pigment-laser device may be used for melasma toning and spot removal, but these are different procedures with different settings and approaches.
Melasma is gradually lightened through repeated low-energy treatment, while discrete spots are treated with focused high energy in closer to a single session.
Because goals and recovery differ, separating the settings according to diagnosis is key to results.
➊Do melasma toning and spot removal use the same device?
This pigment laser emits extremely short picosecond pulses—one trillionth of a second—and changing settings turns the same device into two very different treatments.
Melasma toning makes repeated low-energy passes across the face to gradually fade pigment. Spot or freckle removal concentrates higher energy only on lesions for visible change in one treatment.
Different goals produce very different energy, treatment coverage and post-treatment responses, even with the same device.
Superficial spots and freckles often respond to wavelengths acting more shallowly, while pigment extending toward the dermis, as in melasma, often benefits from deeper-reaching wavelengths.
This is why first assessing pigment depth during diagnosis is important.
➋How do energy settings differ?
Melasma toning generally uses repeated low-power, low-energy passes over a broad area, aiming for only very mild redness.
Low energy is used because melasma can react sensitively to irritation and become darker.
Spots and freckles are often confined to the epidermis, making localized higher energy relatively safer; immediate whitening of the lesion may be the target response.
| Category | Melasma toning | Spot/freckle laser |
|---|---|---|
| Energy delivery | Low energy, repeated over a broad area | Localized high energy |
| Target response | Mild redness | Temporary change at the lesion |
| Lesion depth | Including the epidermal–dermal junction | Mainly epidermal |
| Sensitivity to irritation | High (risk of darkening) | Relatively low |
“Even with the same device, melasma and discrete spots require different treatments with different energy and target responses.”
➌Is it melasma or discrete spots?
Melasma typically spreads relatively broadly with blurred borders over both cheeks, the forehead or nasal bridge, often gradually darkening after pregnancy, hormonal changes or sun exposure.
Spots or freckles are smaller, clearly bounded dots, often longstanding or prominent in areas of chronic sun exposure.
Both commonly coexist; when visual distinction is difficult, a detailed clinical assessment is needed.
Rapid spreading or darkening over recent months suggests more active melasma and calls for greater caution.
Aggressive stimulation in that state can instead darken the pigment.
- ✓Melasma: broad, blurred borders; repeated low energy
- ✓Spots/freckles: distinct dots; localized high energy
- ✓Mixed: settings must be planned separately by area
➍How do sessions and recovery differ?
Melasma toning is commonly divided into around 3–5 sessions several weeks apart, rather than expecting a major change from one session.
The shallower the spot or freckle, the more likely 1 or 2 localized treatments will substantially lighten it with good satisfaction; multiple lesions or varied depths may require more sessions.
| Item | Melasma toning | Spot/freckle laser |
|---|---|---|
| Recommended sessions | 3–5 (varies) | 1–2 (varies) |
| Interval | Several weeks | Additional treatment if needed |
| Recovery pattern | Mild redness resolving within days | Temporary darkening, then crusting and shedding |
Strict sun protection during recovery is important for both.
➎What are the adverse effects and precautions?
Picosecond pigment lasers are understood to cause less thermal injury than conventional nanosecond lasers, but adverse effects are not eliminated and caution remains necessary.
Redness, swelling and temporary pigmentation may occur, and rarely burns or worsening of existing pigment.
Melasma can rebound and temporarily darken in response to irritation; treatment should then be paused and intervals lengthened.
Darker skin tones or active melasma that has rapidly spread recently can respond unpredictably even at low energy, requiring caution.
Temporary flaking or crusts may form after spot/freckle treatment. Let them shed naturally; picking can cause scarring or pigmentation.
➏When do I recommend treatment, and when is caution needed?
I recommend melasma toning for diffuse, blurred facial pigment when someone wants a safer, gradual approach rather than abrupt change.
For several distinct spots or freckles and a wish for clear change despite a few days of crusting, I recommend localized higher energy.
Highly active melasma, recent hormonal changes, pregnancy or strong sun exposure may call for postponement or a more conservative approach.
Although proceeding generates revenue, postponing and observing may be the right choice when there is a risk of darkening.
We assess activity, depth and recent changes together (individual results vary).
“Melasma often suits gradual repeated low energy, while discrete spots suit targeted higher energy for a clearer local change.”
QFrequently asked questions
Melasma is often treated with low energy over around 3–5 spaced sessions.
The number varies with lesion activity and individual response.
Epidermal spots and freckles often lighten noticeably after 1 or 2 localized high-energy treatments.
Additional treatment may be needed depending on depth and individual variation.
Yes. Its sensitivity to irritation can cause temporary rebound darkening.
We adjust by lengthening intervals or pausing treatment.
Within one session, settings can differ by area: low energy for melasma and localized high energy for spots.
We first identify pigment type and depth at consultation, then plan energy and session numbers accordingly (results vary).
Even on the same face, melasma and discrete spots are different pigments requiring different treatment paces.
One device can deliver repeated low-energy melasma toning or localized high-energy spot treatment according to the nature of each lesion.
A consultation at LUNN Clinic can best establish your pigment type and appropriate settings.
Dr. Park Hyungkwon, Director and Dermatologist at LUNN Clinic
Under Article 56 of the Medical Service Act, we disclose that this procedure may cause redness, swelling, temporary pigmentation and, rarely, burns or worsening pigment.
Treatment and procedure results may vary depending on the individual’s condition.
This column is intended to provide medical information.
