Pico laser vs CO₂ laser
Both are 'lasers for the face' and almost opposites. A picosecond laser shatters pigment with ultra-short pulses and little heat; a fractional CO₂ laser vaporises microscopic columns of skin and relies on heat to remodel. One is a pigment tool with fractional extras; the other is a resurfacing tool.
Pico laser vs CO₂ laser: which suits whom?
Pico for sun spots, post-inflammatory marks, tattoo ink and mild texture with little downtime; fractional CO₂ for established acne scars, deep wrinkles and resurfacing when a week of recovery is acceptable. In Asian skin CO₂ needs conservative density to avoid pigmentation.
| Picosecond laser | Fractional CO₂ | |
|---|---|---|
| Mechanism | Photoacoustic, picosecond pulses | Ablative, fractional vaporisation |
| Suited to | Pigment, tattoos, mild texture | Acne scars, deep lines, resurfacing |
| Downtime | Hours to 2 days | 5–10 days |
| Pigmentation risk (Asian skin) | Low at conservative settings | Moderate; density-dependent |
| Sessions | 3–6 for pigment | 1–3 for scars |
| Evidence | Strong for tattoos and lentigines | Strong for scars and photoageing |
| Our verdict | Vetted | Established |
By the numbers
- systematic review
Pooled trials showed 1064 nm picosecond treatment reduced melasma scores, while 755 nm was not superior to topical agents and was associated with post-inflammatory hyperpigmentation.
From the Pico laser review — Efficacy and safety of picosecond laser for the treatment of melasma: a systematic review and meta-analysis., Lasers Med Sci, 2023. PMID 36897459.
- RCT
In photoaged Asian skin the ablative erbium laser improved texture more than the non-ablative 1550 nm laser, with more downtime and a manageable pigment risk.
From the Erbium YAG resurfacing review — A prospective, randomized, double-blind comparison of an ablative fractional 2940-nm erbium-doped yttrium aluminum garnet laser with a nonablative fractional 1550-nm erbium-doped glass laser for the treatment of photoaged Asian skin., J Dermatolog Treat, 2015. PMID 26417998.
- RCT
Both the fractional picosecond and the 1927 nm thulium laser improved photoageing, with differences in downtime and the aspects of photodamage each addressed.
From the Clear + Brilliant and Moxi review — A Randomized, Split-Face, Double-Blind Comparison Trial Between Fractionated Frequency-Doubled 1064/532 nm Picosecond Nd:YAG Laser and Fractionated 1927 nm Thulium Fiber Laser for Facial Photorejuvenation., Lasers Surg Med, 2021. PMID 32285983.
“Pico for sun spots, post-inflammatory marks, tattoo ink and mild texture with little downtime; fractional CO₂ for established acne scars, deep wrinkles and resurfacing when a week of recovery is acceptable.”
The reviews behind this comparison
- Pico laserThe variable that matters is depth, not brightness, and pigment already deposited is only half the problem; the inflammation producing it is the other half.Vetted
- Fractional CO₂ resurfacingThe laser is a controlled injury; the skill is choosing how deep and how dense for this skin, not how much the machine can do.Established
- Erbium YAG resurfacingErbium removes exactly what you tell it to and little more; whether that is better than CO₂ depends on whether you wanted the heat.Established
- FraxelIt trades depth for recovery, which is the right trade for most faces and the wrong one for deep scars.Established
- Clear + Brilliant and MoxiTreating pigment early is sensible; calling it prevention is a story the evidence has not yet told.Promising
How the vetted protocols use them
Questions
Is pico laser good for acne scars?
Is CO₂ laser safe for Asian skin?
Which has less downtime?
Still deciding?
Ask us — or ask to be matched with a practitioner in Singapore who follows evidence-based treatment. The right choice is made at an in-person assessment, not from a table.
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