TL;DR: Picosecond lasers deliver pulses ~10× shorter than Q-switch nanosecond lasers, fragmenting pigment into much smaller particles. Faster tattoo removal, safer dark-skin pigment treatment, more predictable melasma, and non-ablative skin renewal in fractional mode. Brands: PicoSure (Cynosure), PicoWay (Candela), enLighten (Cutera), Discovery Pico (Quanta).
What is a picosecond laser?
| Feature | Q-switch (nanosecond) | Picosecond |
|---|---|---|
| Pulse duration | 5–20 ns | 300–750 ps (10× shorter) |
| Pigment fragmentation | Thermoacoustic + photoacoustic | Mostly photoacoustic |
| Fragment size | Larger | Smaller (macrophages clear faster) |
| Thermal side effect | Higher | Lower |
| Multi-color tattoo response | Limited | Broader spectrum |
| Dark-skin safety | Moderate | Better |
| Tattoo sessions | 8–15 | 4–8 (half) |
| Cost (clinic) | Low-mid | High |
Mechanism: Ultra-short pulse fragments pigment particles by shock wave (mechanical) rather than heat. Smaller fragments → faster macrophage clearance → fewer sessions.
Indications
Tattoo
- Professional tattoo — all colors
- Amateur tattoo
- Cosmetic tattoo (permanent makeup, brow tattoos)
- Traumatic tattoo (asphalt, gunpowder)
- Green, yellow, red, orange tattoo — where Q-switch struggles
- Tattoo removal in dark skin without PIH
Pigment
- Solar lentigo
- Café-au-lait
- Nevus of Ota / Ito
- Melasma — more predictable than Q-switch (still low-dose protocol)
- Post-inflammatory hyperpigmentation
- Becker nevus
Skin renewal (fractional mode)
- Fine lines
- Atrophic acne scars (rolling, boxcar)
- Wide pores
- Skin texture, tone irregularity
- Stria
Fractional picosecond uses MLA (microlens array) or DLA (diffractive lens array) — fragments the pulse into micro-points, triggering collagen response without ablation. Very low downtime.
Modern platforms
| Brand | Maker | Notes |
|---|---|---|
| PicoSure | Cynosure | 755 nm Alex + 532/1064 add-on, Focus lens (skin renewal) |
| PicoWay | Candela | 532/785/1064 nm, shortest pulse (300–450 ps), Resolve fractional |
| enLighten | Cutera | 532/1064 nm, dual pulse mode |
| Discovery Pico | Quanta | 532/694/1064 nm + Ruby — broad wavelength range |
| PicoPlus | Lutronic | 532/595/660/1064 nm, multi-color tattoo |
CE/FDA approval + clinical evidence: PicoSure, PicoWay, enLighten, Discovery.
Skin types
| Fitzpatrick | Picosecond |
|---|---|
| I–VI | All — low thermal damage |
| Dark-skin tattoo removal | Ideal (instead of Q-switch) |
| Dark-skin melasma | Ideal (low-dose protocol) |
Test patch + wavelength matched to skin type always required.
Sessions
| Indication | Sessions | Interval |
|---|---|---|
| Professional black tattoo | 4–8 | 6–8 weeks |
| Color tattoo | 6–10 | 6–8 weeks |
| Solar lentigo | 1–2 | 4–6 weeks |
| Melasma (low dose) | 4–6 | 4 weeks |
| Café-au-lait | 4–8 | 6–8 weeks |
| Fractional skin renewal | 3–5 | 4 weeks |
| Acne scars | 4–6 | 4–6 weeks |
Procedure
- Consultation, dermoscopy, photo
- Antiseptic prep
- Topical anesthesia (sensitive areas)
- Protective eyewear
- Test pulse + 5–10 min wait
- Full-area treatment (seconds per pulse)
- Cold compress, SPF50+, antibiotic ointment (esp. tattoo removal)
Duration: 15–45 min by area.
Downtime
| Indication | Downtime |
|---|---|
| Tattoo | Immediate frosting; crust 5–10 days; redness 1–2 weeks |
| Solar lentigo | Crust 5–7 days |
| Melasma (low dose) | Minimal — 1–3 days erythema |
| Fractional renewal | 1–3 days erythema + mild crust |
Side effects
Expected: immediate frosting; erythema, mild edema; crusting (pigment, tattoo); transient sensitivity. Less common: mild hyperpigmentation, hypopigmentation (especially fair-skin tattoo removal), transient purpura. Rare: scarring (very rare with correct protocol), permanent pigment change, melasma flare (if high dose), allergic reaction (tattoo pigment fragments).
Contraindications
- Active sunburn / tan
- Pregnancy / breastfeeding
- Active herpes
- Keloid tendency
- Isotretinoin within 6 months
- Active vitiligo (Köbner)
- Suspected melanoma
Q-switch vs picosecond — which to choose?
| Question | Answer |
|---|---|
| Black/blue professional tattoo | Q-switch sufficient |
| Color (green/yellow/red) tattoo | Picosecond required |
| Dark skin + tattoo | Picosecond (lower PIH risk) |
| Resistant melasma | Picosecond (more predictable) |
| Non-ablative acne scars | Picosecond (Focus/Resolve lens) |
| Budget-constrained classic lesion/tattoo | Q-switch |
Combinations
- Picosecond + topical hydroquinone + SPF — melasma protocol
- Picosecond + dermapen / RF microneedle — combined skin renewal
- Picosecond + tranexamic acid topical — pigment + lentigo
- Picosecond fractional + PRP — acne scars + renewal
FAQ
Always better than Q-switch? No. For black/blue tattoo and superficial solar lentigo, clinical difference is limited. Picosecond's proven advantage is in dark skin and colored tattoo. One session removes a tattoo? No. 4–8 sessions. Summer? Pigment work — no. Tattoo removal with strict SPF50+ — possible. Pregnancy? No. Painful? Topical + ice tolerable. Tattoo removal is more sensitive. Cosmetic / permanent-makeup tattoo removal? Yes, but careful — some pigments (titanium dioxide) can darken under picosecond. Test patch essential.
Our approach
- Tattoo type + color profile pre-analysis
- Test pulse + before/after photo
- Wavelength matched to skin type (532/1064 nm)
- CE/FDA system
- Multi-modal approach for melasma (laser + topical + sun protection)
Conclusion
Picosecond laser is the modern gold standard for tattoo removal and resistant pigment. Evolution of Q-switch: faster, safer, more consistent in dark skin. The cost premium is justified where its clinical advantage applies.
Dr. Murat Toktamısoglu, MD, PhD — Ataşehir, Istanbul. WhatsApp: +90 533 356 2480. Last medical review: May 18, 2026.
