Anyone weighing pico laser for melasma runs into the same wall. The first two sessions look promising, the patch fades, and then over the following months the colour drifts back across the cheekbones. Patients read that as failure. It is closer to a misunderstanding of what the treatment does.
Melasma is not a stain sitting on top of the skin. It is a chronic condition in which melanocytes overreact to light, heat and hormonal change, and keep producing pigment long after the original trigger has gone. A laser can remove the pigment that is present on the day of treatment. It cannot switch off the tendency that created it, and no responsible clinic should suggest otherwise.
Pigment in melasma can sit in the epidermis, in the dermis, or in both layers at once. Epidermal pigment responds more predictably, because it is closer to the surface and clears through the skin’s normal turnover. Dermal pigment is deeper, sits among collagen and blood vessels, and clears far more slowly. Mixed melasma, with pigment in both layers, is common on the cheeks and upper lip.
That single fact explains most of the disappointment people describe. A course of treatment that visibly clears the epidermal layer can leave the dermal component untouched, and the surface may look better for a while before the deeper pigment becomes visible again.
A second mechanism works against aggressive treatment. Heat and inflammation can stimulate melanocytes. Treat too hard and the skin may answer by producing more pigment, not less. The result is post-inflammatory hyperpigmentation sitting on top of melasma, which is harder to read and harder to clear.
Every credible melasma plan is built from the same three variables:
Clinics that struggle tend to optimise the first two and neglect the third. The protocol looks aggressive on paper, and the follow-up is thin.
A picosecond is one trillionth of a second. Pulses that short do not have time to heat tissue the way older lasers did, and that changes both the mechanism and the risk profile.
When energy lands in a few hundred picoseconds, pigment particles absorb it faster than heat can spread. The particle shatters under the resulting pressure wave, a photoacoustic effect rather than a slow cooking process. The fragments left behind are small enough for the body’s own clearance cells to carry away.
Nanosecond Q-switched lasers break pigment into larger pieces and rely more on heat to finish the job. Those pieces take longer to clear, and the heat spreads into surrounding tissue that carries no pigment to target. On a face with melasma, that surrounding tissue is exactly what you want to protect.
Facial skin is thin, well supplied with blood, and highly visible when something goes wrong. A treatment that leaves less thermal residue can be repeated with less cumulative strain, and that matters because melasma is managed over months and years rather than in a single visit.
Short pulses are not a free pass. Energy still has to be chosen for the case, and a low-fluence pass with a short pulse will still irritate skin if the interval between sessions is too short.
Wavelength is the first real decision in any pigment case, and the hardest one to correct later. Four wavelengths cover the useful range, and each one does a different job.
| Wavelength | Reach | Absorbed most strongly by | Role in a pigment plan |
| 1064 nm | Deepest of the four | Dark pigment and melanin, with weaker absorption in the epidermis | Dermal pigment, larger areas, and darker skin tones where surface risk is high |
| 755 nm | Mid-depth | Melanin, with high selectivity for pigment over surrounding tissue | Stubborn pigment in lighter skin tones, used with care on darker skin |
| 532 nm | Superficial | Red, orange and light brown pigment | Epidermal pigment, sun spots, freckles |
| 1320 nm | Dermal, water-targeted | Water in the tissue rather than melanin | Texture, oil control and rejuvenation rather than pigment removal |
Melasma rarely presents as a single colour at a single depth. A cheek can carry superficial brown pigment, deeper grey-brown pigment and a patch of redness from earlier treatments, all within a few centimetres. A single wavelength reaches one depth well and the others poorly, so the visible result becomes uneven. Part of the patch lifts, the rest stays, and the outline can end up looking worse than before.
Clinics that treat a lot of pigment tend to work the same patch with more than one wavelength across a course, adjusting to how the skin responds instead of following a fixed recipe. That approach only works if the machine can produce those wavelengths without a second purchase.
Depth is estimated during examination. Epidermal pigment usually looks brown and has clear edges; dermal pigment tends to look grey or blue-grey with softer borders. Examination under a Wood’s lamp, standard practice in pigment consultations, helps separate the two before any energy is applied.
That examination decides the starting wavelength, the starting energy and the interval. Skipping it and treating every brown patch the same way is the most common route to a poor result on melasma specifically.
Choosing pico laser for pigmentation on darker skin is a different decision from choosing it for lighter skin, even when the pigment looks identical in the photograph.
Higher baseline melanin competes with the target pigment for the beam’s energy, and melanocytes in darker skin respond more vigorously to injury. Both effects push in the same direction. A setting that clears pigment comfortably on Fitzpatrick type II can trigger post-inflammatory hyperpigmentation on type IV or V.
The physics has not changed. The margin for error has.
A test spot on a small, less visible area comes first, with a review after two to three weeks before the full face is treated. Energy is set lower and raised only if the skin tolerates it. Intervals run longer, often six to eight weeks rather than four. Sun protection becomes part of the plan rather than advice handed out at the end.
Some clinicians also prime the skin with topical agents for a few weeks before the first session, to calm melanocyte activity. That call belongs to the treating clinician, and it depends on the case rather than on the device.
Patients want the patch gone before a wedding, a holiday or a reunion. The understandable response is to book sessions close together. For melasma, that is usually the wrong move.
Clearing fragmented pigment takes time. The cells that remove it need several weeks to work through the area, and the skin barrier needs time to recover between passes. At the fluence that clears pigment, a two-week interval leaves no quiet period, and low-grade inflammation is one of the conditions melasma thrives on. Low-fluence toning protocols run at tighter intervals, often one to two weeks, because they work well below clearance level and ask much less of the skin each time. That is a different treatment with a different aim, and judging one schedule by the other is where the confusion starts.
There is also a measurement problem. Pigment still being cleared looks like pigment that has not responded, so treating again too early means treating a result you cannot yet read, then raising energy to chase it.
A workable schedule for most cases runs four to six weeks between sessions where pigment is predominantly epidermal, and six to eight weeks where the dermis is involved. Two to three sessions usually show whether the plan is working. After that, the sensible move is to reassess rather than to keep booking.
Maintenance is the part that gets dropped. Once the patch has faded, a shorter maintenance session every few months, combined with daily sun protection, does more for the long-term result than another round of aggressive treatment.
The honest answer to pico laser downtime is that it depends on the settings used and on the skin being treated, not on the word pico alone.
At the low energies used for melasma, a pico laser treatment typically leaves the skin red for a few hours, with a sensation similar to mild sunburn that settles over the following day. Some experience slight swelling. Pigment may darken for a few days before it begins to flake or fade, which is normal and often mistaken for a worsening result.
At higher energies, used for tattoo removal or stubborn isolated spots, the skin can develop small crusts and needs several days of care. Same platform, different settings, different recovery.
What holds across both is aftercare: sun avoidance for at least two weeks, broad-spectrum protection reapplied through the day, gentle cleansing, and no exfoliating acids or retinoids until the skin has settled. For a melasma patient, that aftercare is not a courtesy. It is the part that protects the result.
Most of the clinical decisions above depend on the clinician, not on the hardware. The hardware sets the ceiling: the wavelengths available, how much energy actually reaches the skin, and what each session costs to run. Those three factors decide whether a clinic can treat melasma repeatedly without turning every case into a loss.
A platform carrying 1064, 532, 755 and 1320 nm covers the pigment range in the table above with three of those wavelengths, and the fourth adds a rejuvenation option, all from one handpiece set. In practice, a mixed melasma case can then be worked at more than one depth across a course without referring the patient out, and the clinic can accept darker skin tones that a single-wavelength device would put at unnecessary risk.
Generating 2000 mJ is one problem. Delivering it to the skin is another. The LaserTell pico platform uses a seven-section articulated light guide arm with 360° rotation and beam transmittance above 95%, with an adjustable spot size from 2 to 10 mm. Energy that stays inside the arm never reaches the pigment, and it is paid for on every session.
The adjustable spot size does something practical as well. A small spot concentrates energy into a defined patch; a larger spot covers a cheek in fewer passes. On full-face melasma work, that difference shows up in treatment time, and treatment time is what limits how many cases a clinic can run in a day.
Many pico platforms are built around cartridges or tips with a finite shot count, and each replacement is a recurring cost. This platform is rated for unlimited shots across its working life, with no per-shot consumable limit. For a clinic running pigment work every week, that removes a cost line which otherwise grows with each patient treated.
Pigment work is repetitive: several passes, several areas, several patients. The four-wavelength platform from LaserTell is built for that rhythm, with a 3000 W power supply, a Canadian Beamtech laser source with multistage amplification, a double rod and double lamp design, and water cooling through an Italian pump and pure copper radiator. A 15.6-inch touch screen keeps settings visible during treatment. The unit carries CE and RoHS marking.
None of that makes a clinical decision for the operator. It does mean the machine holds its output through a full day of sessions, which is where inconsistent results usually come from.
Before comparing prices, write down what the clinic actually needs to treat. Every pico laser machine in this class quotes wavelengths first, because that one line decides the case mix the device can accept.
A checklist that separates real capability from marketing:
Cost per session is worth calculating before signing, because purchase price alone hides the difference between platforms. Multiply sessions per day by price per session by working days: six sessions a day at 150 across 22 days comes to 19,800 a month before rent, labour and consumables. A platform without per-shot limits removes one line from that sum, and a larger spot shortens each appointment so more sessions fit in a day. Run the figures against your own case mix.
Because the treatment removes pigment, not the tendency to produce it. Melasma responds to light, heat and hormonal change, so pigment returns when those triggers return. Daily sun protection and periodic maintenance are part of managing the condition, not optional extras.
It can be, with the right settings. The main risk is post-inflammatory hyperpigmentation, and it rises with energy and with short intervals. A test spot, lower energy and longer gaps between sessions are the standard precautions.
Most unwanted pigment lightens noticeably within two to three sessions. Melasma often needs a longer course plus maintenance, because the condition is chronic. The number depends on pigment type, depth and how the skin responds.
No device offers that, and any claim of a permanent cure deserves suspicion. Pigment can be cleared and kept under control, but it returns with sun exposure. Realistic expectations and consistent protection matter more than session count.
Wavelength range, beam delivery, spot size, consumable limits, cooling, training, warranty and local service. Ask for the full parameter table and the user manual, and test the unit on a representative case before committing to a multi-unit purchase.
Melasma fades under pico light because the pulse breaks pigment into fragments the body can clear, and it comes back because the conditions that produced it were never addressed. The result is decided less by the word pico on the casing than by three choices made in the consultation: which wavelength, how much energy, and how long the skin is given between sessions. Get those right and the device becomes a tool that produces repeatable outcomes. Get them wrong and no number of extra sessions will fix it.
If you are building out a pigmentation service and want to check whether a four-wavelength configuration fits your case mix, tell us what you treat most and we will walk you through the parameters that matter for it.
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Beijing LaserTell Medical Co., Ltd. is a pioneer in the integration of advanced technologies within the field of medical aesthetics. Located in Beijing with convenient transportation access, we are committed to strict quality control, professional customer service, and innovative development.