Pico laser treatment is a type of cosmetic laser procedure that fires energy in ultrashort pulses, each lasting just trillionths of a second (picoseconds). These pulses are roughly 100 times shorter than those from older laser systems, which means the energy shatters pigment and stimulates collagen through pressure waves rather than heat. That distinction is what makes pico lasers popular for treating pigmentation, acne scars, wrinkles, and tattoo removal with less downtime than traditional lasers.
How Pico Lasers Work
Traditional lasers use pulses measured in nanoseconds (billionths of a second), typically around 50 nanoseconds. Pico lasers cut that pulse duration down to roughly 375 to 450 picoseconds, depending on the wavelength. That difference matters because of how energy interacts with your skin.
When a laser pulse is long enough, it heats the target and the tissue around it. This is called a photothermal effect, and it’s what causes much of the redness, swelling, and risk of burns with older lasers. As pulse duration gets shorter, the energy shifts from generating heat to generating a pressure wave, known as a photoacoustic effect. Pico lasers operate almost entirely in this photoacoustic range. Instead of cooking pigment particles, they shatter them into tiny fragments that your body’s immune cells can clear away more efficiently.
This same pressure wave can also create microscopic zones of disruption beneath the skin’s surface, triggering your body’s wound-healing response and stimulating new collagen and elastin production. That’s why pico lasers are used not just for pigment removal but also for skin texture and fine lines.
What Pico Lasers Treat
The FDA has cleared picosecond laser systems for a broad range of skin concerns. The current list of approved uses includes:
- Tattoo removal (all ink colors, though some respond faster than others)
- Benign pigmented lesions such as sunspots and freckles
- Melasma
- Café au lait spots
- Lentigines (age spots)
- Nevus of Ota (a type of deep birthmark)
- Acne scarring
- Wrinkles
Different wavelengths target different depths and pigment colors. A 1064 nm wavelength penetrates deeper and works well for dermal pigment like melasma and dark tattoo ink. A 755 nm wavelength is effective for green and blue tattoo pigments. A 532 nm wavelength targets superficial red and orange pigments closer to the skin’s surface. Most clinics use devices that can switch between wavelengths depending on what’s being treated.
Tattoo Removal Results
Tattoo removal was one of the first major uses for picosecond lasers, and it remains one of the most effective. A systematic review of clinical trials found that 69% to 100% of tattoos showed over 70% pigment clearance after 1 to 10 treatment sessions. Black and blue inks tend to respond best and fastest, while colors like yellow, orange, and white can be more stubborn.
The advantage over older nanosecond lasers comes down to how well the pulse shatters ink particles. Nanosecond pulses aren’t short enough to fall below the thermal relaxation time of tattoo pigment, meaning some energy dissipates as heat rather than breaking up the ink. Picosecond pulses are short enough to maximize that shattering effect, which often translates to fewer sessions and better clearance rates, particularly for resistant colors and previously treated tattoos.
Treating Melasma and Pigmentation
Melasma is notoriously difficult to treat because the pigment sits deep in the dermis and tends to recur. Pico lasers using a 1064 nm wavelength with a fractional lens array have shown promising results. In a clinical study of 20 adults who received four monthly treatments, patients saw an average 37% improvement at three months and 27% improvement at eight months. Ninety percent of participants reported being satisfied with their results at both follow-up points.
The slight drop between three and eight months reflects the nature of melasma itself: it’s a chronic condition influenced by hormones and sun exposure. Pico laser treatment works best as part of a broader management plan that includes sun protection and topical treatments, not as a standalone cure.
What the Treatment Feels Like
Most people describe the sensation as a series of rapid snapping or prickling feelings against the skin, similar to a rubber band snapping but faster. Numbing cream is typically applied 20 to 30 minutes beforehand to reduce discomfort. A full-face session usually takes 15 to 30 minutes depending on what’s being treated.
Immediately after treatment, you can expect redness, mild swelling, and sometimes tiny dark spots on the skin. These are normal responses. The redness and swelling generally fade within a few hours to a couple of days. By the end of the first week, most visible effects have resolved, and those tiny dark spots begin to flake off, revealing fresher skin underneath. Compared to ablative lasers that remove layers of skin, the recovery from pico laser treatment is noticeably shorter and less disruptive to your daily routine.
Safety for Darker Skin Tones
One of the biggest risks with any laser treatment on darker skin (Fitzpatrick skin types IV through VI) is post-inflammatory hyperpigmentation, where the treated area becomes darker than the surrounding skin. This happens because melanin in the epidermis absorbs laser energy and can be injured in the process.
Pico lasers carry a lower risk of this than older thermal lasers because they rely more on pressure waves than heat. Still, the risk isn’t zero. Practitioners typically adjust settings for darker skin by using longer wavelengths like 1064 nm, which penetrate deeper and bypass more of the melanin-rich upper layers. Lower energy levels and lower treatment densities also help protect the epidermis. Some providers use a small test patch first, especially if you have a history of hyperpigmentation or scarring, to see how your skin responds before treating a larger area.
Pre-treatment and post-treatment with skin-lightening agents and epidermal cooling during the procedure further reduce the chance of pigment changes in darker skin.
Who Should Avoid Pico Laser
Certain medical histories warrant extra caution. If you have a tendency toward keloids or hypertrophic scarring, the treatment could trigger raised scars. A history of herpes simplex outbreaks, particularly around the mouth, can be reactivated by facial laser treatment, so antiviral medication is typically prescribed beforehand. Traumatic tattoos containing embedded material from explosions (fireworks, gunpowder) pose a unique risk because the laser can ignite those particles.
Your provider should also review your current medications, since some drugs increase photosensitivity and can raise the risk of burns or pigment changes.
Cost and Number of Sessions
A single full-face pico laser session for skin toning or pigment treatment typically costs $400 to $1,000, depending on your location and the clinic. Metropolitan areas tend to charge on the higher end. Many clinics offer package discounts when you commit to a series of sessions upfront.
The number of sessions you’ll need depends entirely on the concern being treated. Pigmentation and skin rejuvenation often require 3 to 6 sessions spaced about a month apart. Tattoo removal can take anywhere from 4 to 10 sessions, with stubborn or multicolored tattoos requiring more. Melasma may need periodic maintenance treatments even after initial improvement, given its tendency to return with sun exposure or hormonal shifts.
Major Pico Laser Devices
The three most widely used picosecond laser systems are PicoSure, PicoWay, and Enlighten. PicoSure uses a 755 nm alexandrite wavelength, which is particularly effective for blue and green tattoo pigments and has a strong track record in pigment and skin revitalization treatments. PicoWay holds the broadest set of FDA clearances, covering everything from melasma and café au lait spots to acne scarring. Enlighten offers both picosecond and nanosecond modes, giving practitioners flexibility to switch between pulse durations depending on the target.
The device matters less than the skill of the person operating it. An experienced provider who understands how to select the right wavelength, energy level, and spot size for your specific skin type and concern will get better results than any single brand name on its own.