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Picosecond lasers are good devices sold with better copy than they have data — they do clear tattoos, they help on stubborn blue and green ink, and some studies show fewer sessions than the older nanosecond lasers, but the head-to-head comparisons are few, small and inconsistent. So ask about the operator and the plan, not the machine: which wavelengths it has, because ink color decides that, how many sessions they estimate, and what happens if it does not clear. A skilled provider on an older quality-switched laser will do better by you than a beginner on the newest platform in town. And complete disappearance is not the usual outcome — faded, with a shadow that catches the light, is, and anyone guaranteeing a blank canvas is telling you what you want to hear.
— Dr. Schwarz, Board Certified Dermatologist
Key Facts
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| Also called | Pico laser, picosecond-domain laser. Device names include PicoSure, PicoSure Pro, PicoWay, enlighten, Discovery Pico |
| Downtime | Usually 3 to 7 days on tattoos, with swelling, pinpoint bleeding, scabbing and sometimes blisters. Pigment and texture treatments are often back to normal in one to three days |
| Sessions | Commonly 5 to 10 or more for a professional tattoo, 6 to 8 weeks apart. Fewer for amateur tattoos. Usually 1 to 3 for a single brown spot, and a longer maintained course for melasma |
| Typical cost | Roughly $200 to $500 a session for a small to medium tattoo in the US, with larger pieces priced higher. Not covered by insurance |
| Results timeline | Visible fading between sessions over 6 to 8 weeks, with the whole course running a year or more for a large tattoo |
| Pain | Described as a hot elastic band snapping, or spattering fat. Generally more intense than getting the tattoo, though it is over faster. Numbing is common |
| Skin tone safety | The 1064 nm wavelength is the usual choice on deeper skin tones because surface pigment absorbs it least. The 532 nm and 755 nm wavelengths carry more risk of light or dark patches |
| Ink colors | Black and dark blue clear most readily. Green and light blue are difficult. Red, orange and yellow are variable. White, flesh-toned and pastel cosmetic inks can turn dark and should be tested first |
What It Is
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A picosecond laser fires pulses lasting picoseconds — trillionths of a second. It is used mainly to break up tattoo ink and clumped brown pigment, and in a fractional mode for acne scars, texture and fine lines. It replaced quality-switched lasers, usually written Q-switched, whose pulses last nanoseconds. Those have been the standard tattoo lasers since the 1990s and are still in wide use. A picosecond is a thousand times shorter than a nanosecond, but commercial picosecond devices mostly fire at a few hundred to around a thousand picoseconds, while quality-switched lasers fire at a few nanoseconds. The real gap is a handful of times, not a thousand. “Pico” is a category name, and pulse durations differ substantially between devices sold under it. Ink color determines which color of light gets absorbed, so most platforms carry several wavelengths: 1064 nm for black and dark blue, 532 nm for red and orange, and something in the 730 to 785 nm range for blue and green. Some add a lens array or holographic optic that concentrates energy into microscopic points — the mode used for scars and texture.
How It Works
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Tattoo ink sits in particles too large for the immune system to carry away, which is why a tattoo stays put. The laser breaks those particles into fragments small enough to clear.
When a very short pulse is absorbed by an ink particle, the energy arrives faster than heat can escape. The particle heats and expands so fast that the pressure shatters it rather than cooking it. Immune cells carry the fragments to the lymph nodes over the following weeks, and some are shed in the scab. A tattoo fades between sessions, not during one.
Shorter pulses should put more energy into shattering the particle and less into heating the tissue around it: smaller fragments, more clearance per session, less heat damage. Laboratory and clinical work supports the mechanism.
How much it matters in practice is the honest uncertainty. Reviews generally find picosecond devices perform at least as well as quality-switched ones, and some report clearance in fewer sessions. But the comparative trials are few, small, and use different devices, wavelengths and endpoints, and they do not consistently show the advantage advertising implies. Both types clear tattoos. The size of the difference is not settled.
On brown pigment the mechanism is the same, with melanin as the target. In fractional mode the energy is concentrated into tiny columns that injure part of the skin and leave the rest alone — the repair response used for scars and texture.
Skin is about two millimetres thick on the face. How deep a treatment reaches decides what it can change, and whether it treats all of the skin or scattered columns of it decides how long you take to heal.
How it works
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Skin basics
This works around one to one and a half millimetres down, in the middle of the dermis where collagen is made. That is the depth that changes scarring and firmness, and it is also why the downtime is longer and the result takes months to appear. The light passes through the surface and heats a column underneath it. The surface stays whole, so you leave red rather than raw — and it takes a course of sessions rather than one.
A peel or a scrub takes the skin off evenly from the surface down. Everything above the line goes and nothing below it is touched, which is why peels suit surface pigment and rough texture, and why the whole face flakes for a few days after.
Needles make hundreds of separate channels and leave the skin between them untouched. That untouched skin is what heals the rest, so recovery is quick — but a needle only injures the skin to start repair. It removes nothing.
The laser removes columns of skin outright: the white gaps here are tissue that is gone, and new skin grows in from the sides. The strongest of the four, and the longest to heal.
The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.
The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.
What It Treats
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Not the Best For
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Pros and Cons
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- Good on difficult ink The extra wavelengths target green and light blue.
- Often fewer sessions Studies report clearance in fewer treatments.
- Less heat in theory More energy shatters the particle than heats skin.
- 1064 nm on board The wavelength that spares surface pigment is standard.
- Short downtime for pigment and texture A few days of redness, not a wound.
- The claims outrun the evidence “Pico” is marketing, not a standard.
- It costs more per session More than a quality-switched laser, canceling the saving.
- It is still a course Five to ten sessions or more, over a year or longer.
- Complete clearance is not usual Faded, with a shadow, is the usual outcome.
- Real pigment risk Pale and dark patches, most of all on deeper skin tones.
- Cosmetic tattoos can darken Pale inks can turn gray or black instantly.
How to Prepare
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What Happens
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Recovery
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Aftercare
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Risks
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Frosting, swelling, pinpoint bleeding, scabbing and a few days of soreness are expected, not complications. The real risks are pigment change, scarring, infection, and cosmetic ink turning dark.
In Deeper Skin Tones
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Picosecond lasers are used on deeper skin tones, and tattoo removal there is routine. Wavelength choice is what makes it work.
Melanin absorbs laser light strongly at short wavelengths and weakly at long ones. At 1064 nanometers, surface pigment absorbs relatively little, so the pulse reaches the ink without burning the skin above it. That is why 1064 nm is the usual working wavelength on deeper skin tones — the same physics that makes the Nd:YAG laser safer for hair and vessels. The shorter wavelengths, 532 nm and 755 nm, are absorbed far more by melanin and carry a higher risk of a light or dark patch. Those are exactly the wavelengths needed for red, orange, blue and green ink, so a multicolored tattoo on a deeper skin tone is a genuinely harder problem.
Post-inflammatory hyperpigmentation — brown patches after inflammation — is common and usually fades over months with strict sun protection and sometimes a prescription pigment cream. Loss of pigment is less common and far more stubborn, and can leave a pale patch in the outline of the old tattoo.
What a careful provider does: a test spot and a wait of several weeks before treating the whole area, conservative energy, 1064 nm wherever the ink allows, longer gaps than the standard six to eight weeks, and no treatment on sun-exposed skin. Ask how often the provider treats your skin tone, and ask to see their own photographs of skin like yours rather than the manufacturer's.
If You Stop
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For tattoos, what has cleared stays cleared — ink broken up and carried away does not come back. If you stop mid-course you keep a partially faded tattoo, which for some people is a reasonable place to stop; a faded tattoo is easier to cover with a new one.
What can change after you stop is the skin, not the ink. Dark patches usually keep fading over months. A pale patch where the tattoo was may recover slowly, partially, or not at all.
Pigment work is different. Sun spots can return with more sun exposure. Melasma very commonly returns after treatment stops, sometimes within months, which is why it is managed with daily sun protection and pigment creams rather than treated once and closed.
Scar and texture results generally hold, but skin keeps aging, so the gap between treated and untreated skin narrows over years.
Combining Treatments
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Insurance Coverage
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Insurance does not cover tattoo removal or cosmetic pigment treatment. Rare exceptions exist for tattoos placed without consent or in trafficking, and some regions run charitable or reduced-cost programs for gang-related and hand or face tattoos. Ask about payment plans rather than buying a large package before you know how your skin responds.
Ask Your Doctor
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At-Home Versions
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How It Compares
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Finding a Provider
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Rules on who may operate a laser vary widely by US state. Some restrict it to physicians, physician assistants and nurse practitioners; others allow nurses, laser technicians or estheticians under supervision that is sometimes remote. Tattoo removal is offered everywhere from dermatology practices to standalone removal shops. Check the rules where you live.
Useful questions: which device and which wavelengths, and which will be used for each color in my tattoo. What is the pulse duration, in picoseconds. How many sessions do you estimate, and what will the end result look like. Will you do a test spot. How many people with my skin tone do you treat. What is your plan if I get a pale patch or a scar. Ask to see their own photographs of tattoos and skin tones like yours.
Red flags: a guarantee of complete removal, a fixed low session count promised at the first visit, no test spot on a cosmetic tattoo or a deeper skin tone, no eye protection, a large package demanded up front, and a clinic that leads with the machine's brand name rather than the plan for your tattoo.
Myths
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- “Pico lasers remove a tattoo in one or two sessions.” They do not. Most professional tattoos take five to ten sessions or more, over a year or longer. Advertising photos rarely say how many treatments they represent.
- “Picosecond is always better than the older lasers.” Not established. Studies generally find picosecond devices perform at least as well as quality-switched ones and sometimes in fewer sessions, but the trials are few, small and inconsistent. “Pico” is a marketing category, and pulse durations differ a lot between devices. The provider's experience is usually the bigger variable.
- “It removes tattoos without any risk to the skin.” Loss of pigment in the shape of the tattoo is one of the commonest lasting outcomes, and scarring, blistering and dark patches all happen. Less heat is not no risk.
- “Tattoo removal creams work.” They do not remove ink. Ink sits below the layer those creams reach, and the acidic products sold for this cause burns and scars. Salt scrubbing and DIY abrasion are worse.
- “Deeper skin tones cannot have tattoo removal.” They can, using 1064 nm, conservative settings, test spots and longer gaps. Multicolored ink is harder, because the wavelengths needed for some colors carry more pigment risk.
- “Any tattoo can be completely erased.” Faded, sometimes almost invisible, with a shadow that catches the light, is the usual result. Ink type, depth and color decide, and none can be read from the surface beforehand.
Questions Patients Ask
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Is a picosecond laser better than an older Q-switched laser?
Not settled. Studies generally find picosecond devices perform at least as well, and some report clearance in fewer sessions, but the head-to-head trials are few, small and inconsistent. “Pico” is a marketing category, not a standard, so devices differ a lot. The provider's experience and the wavelengths available for your ink colors matter more than the category name.
How many sessions will my tattoo take?
Most professional tattoos need five to ten or more, six to eight weeks apart, so a year or longer. Amateur tattoos need fewer, cover-ups more. Nobody can give an accurate number at the first visit; how the first two sessions go is the best predictor available.
Will my tattoo disappear completely?
Sometimes, but heavily faded with a faint shadow is more common. Ink type, depth, color, age and location all matter, and none can be judged from the surface beforehand. Treat a guarantee of complete removal as a warning sign.
Which colors are hardest?
Black and dark blue clear most readily. Green and light blue are hardest and need specific wavelengths. Red, orange and yellow are unpredictable. White, flesh-toned and pastel cosmetic inks can turn dark instantly, which is why they get a test spot first.
Can it be used on deeper skin tones?
Yes, generally at 1064 nm, because surface pigment absorbs it least — the same reason the Nd:YAG laser is preferred there for hair and vessels. Multicolored tattoos are harder, because the wavelengths needed for some colors carry more risk of a light or dark patch. Conservative settings, test spots and longer gaps are standard.
Does it help melasma?
Sometimes, with mixed results. Melasma often improves during a course and then returns, and heat and light can provoke it. Most dermatologists lead with sun protection and pigment creams and add laser cautiously.
References
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- Wu DC, Goldman MP, Wat H, et al. A Systematic Review of Picosecond Laser in Dermatology: Evidence and Recommendations. Lasers in surgery and medicine. 2021. — Lasers in surgery and medicine, 2021
- Feng J, Shen S, Song X, et al. Efficacy and safety of picosecond laser for the treatment of melasma: a systematic review and meta-analysis. Lasers in medical science. 2023. — Lasers in medical science, 2023
- Li J, Duan F, Kuang J. Fractional picosecond laser for atrophic acne scars: A meta-analysis. Journal of cosmetic dermatology. 2023. — Journal of cosmetic dermatology, 2023
- Dong W, Wang N, Yuan X, et al. Treatment of pigmentary disorders using picosecond laser in Asian patients: A meta-analysis and systematic review. Dermatologic therapy. 2021. — Dermatologic therapy, 2021
- Ma W, Gao Q, Liu J, et al. Efficacy and safety of laser-related therapy for melasma: A systematic review and network meta-analysis. Journal of cosmetic dermatology. 2023. — Journal of cosmetic dermatology, 2023