Fractional CO₂ resurfacing
Ablative fractional laser · 'laser peel' · downtime resurfacing
Day-by-day CO₂ recovery diaries are a TikTok genre of their own, with 'gone wrong' and 'worth it' videos circulating in equal measure, and skin resurfacing remains one of the highest-volume minimally invasive categories in the ASPS statistics.
Search interest: about 800 searches a month in Singapore for “co2 laser” (Ahrefs, October 2026).
The laser is a controlled injury; the skill is choosing how deep and how dense for this skin, not how much the machine can do.
Reviewed against the Aesthetics International standard. Category: Lasers.
Does Fractional CO₂ resurfacing work?
Established. The laser is a controlled injury; the skill is choosing how deep and how dense for this skin, not how much the machine can do. Fractional CO₂ has the deepest evidence base of any resurfacing method for atrophic acne scars, with several systematic reviews and meta-analyses supporting it, and recent meta-analyses of RCTs finding it comparable to RF microneedling for scars with more downtime and more post-inflammatory darkening.
- Verdict
- Established Long clinical track record. Results depend on selection and technique more than on the device.
- Evidence base
- 4 PubMed-indexed studies cited below, including systematic reviews.
- Suits
- Atrophic acne scars, etched lines around the mouth and eyes, sun-damaged texture and surgical scars in people who can take a week of visible recovery.
- Not for
- Active acne or infection, recent isotretinoin without specialist advice, keloid tendency, untreated melasma, and anyone who cannot protect the skin from sun for weeks afterwards.
- In Singapore
- Fractional CO₂ lasers are HSA-registered medical devices and, under MOH's aesthetic practice guidelines, are performed by doctors in Singapore.
- Category
- Lasers · about 800 searches a month in Singapore for “co2 laser”
- Reviewed
- 1 October 2026 by Aesthetics International. Revised as evidence and regulation change.
What it is
A 10,600 nm carbon dioxide laser vapourises columns of skin in a grid, leaving intact skin between them to speed healing. Fully ablative CO₂ removes the whole surface; the fractional version treats a fraction of it, which is why downtime fell from weeks to days and the treatment became mainstream.
How it works
Water in tissue absorbs the beam, so each column is vapourised with a surrounding zone of heat that tightens collagen. Depth, density and pulse shape decide the result: shallow dense passes for texture and tone, deep sparse passes for scars and lines. Downtime, result and pigment risk all scale with how much tissue is removed, which is a decision, not a property of the laser.
What the evidence says
Fractional CO₂ has the deepest evidence base of any resurfacing method for atrophic acne scars, with several systematic reviews and meta-analyses supporting it, and recent meta-analyses of RCTs finding it comparable to RF microneedling for scars with more downtime and more post-inflammatory darkening. A 2021 systematic review of 1,093 patients confirmed that ablative lasers give larger improvement than non-ablative ones at the cost of more adverse effects. In Asian skin, retrospective series report post-inflammatory hyperpigmentation as the commonest complication, usually transient when settings are conservative.
What people are saying
Paraphrased from public discussion on TikTok, Instagram, Reddit and in the press. Not testimonials, and not about any one clinic. Reported in: realself.com, asds.net, prnewswire.com.
What the studies show
- systematic review
Pooled studies showed improvement in depressed acne scars after fractional CO₂, with heterogeneity in protocols and outcome measures.
A systematic review and meta-analysis on the effects of the ultra-pulse CO2 fractional laser in the treatment of depressed acne scars. — Ann Palliat Med, 2022. PMID 35249351.
- systematic review
Across randomised trials the two methods gave comparable scar improvement; CO₂ carried more downtime and post-inflammatory pigmentation.
Fractional CO2 Laser Versus Micro Needling Radiofrequency for Post Acne Scarring: A Meta-Analysis of RCTs. — J Cosmet Dermatol, 2026. PMID 41821146.
- systematic review
Ablative lasers produced greater improvement than non-ablative lasers, with higher rates of adverse effects and longer recovery.
Outcomes and adverse effects of ablative vs nonablative lasers for skin resurfacing: A systematic review of 1093 patients. — Dermatol Ther, 2021. PMID 33084193.
- cohort
In Asian patients scars improved over a course of sessions; post-inflammatory hyperpigmentation was the commonest complication and was usually transient.
Treatment of Facial Acne Scarring With Fractional Carbon Dioxide Laser in Asians, a Retrospective Analysis of Efficacy and Complications. — Dermatol Surg, 2017. PMID 28746258.
Studies are selected for relevance and quality, not for agreement with the verdict; PubMed records are linked so the reader can check them.
Who it suits
Suits
Atrophic acne scars, etched lines around the mouth and eyes, sun-damaged texture and surgical scars in people who can take a week of visible recovery.
Not for
Active acne or infection, recent isotretinoin without specialist advice, keloid tendency, untreated melasma, and anyone who cannot protect the skin from sun for weeks afterwards.
Alternatives
The two reviewed treatments most often weighed against Fractional CO₂ resurfacing, on the same standard.
| Fractional CO₂ resurfacing | Pico laser | Erbium YAG resurfacing | |
|---|---|---|---|
| Verdict | Established | Vetted | Established |
| What it is | A 10,600 nm carbon dioxide laser vapourises columns of skin in a grid, leaving intact skin between them to speed healing. | A picosecond laser delivers energy in pulses a thousand times shorter than the nanosecond lasers that came before it. | A 2,940 nm erbium-doped YAG laser that is absorbed by water about ten times more strongly than CO₂, so it removes skin in very thin, precise layers with little heat left behind. |
| Evidence base | 4 PubMed-indexed studies cited below, including systematic reviews. | 4 PubMed-indexed studies cited below, including systematic reviews. | 4 PubMed-indexed studies cited below, including systematic reviews, randomised trials. |
| Suits | Atrophic acne scars, etched lines around the mouth and eyes, sun-damaged texture and surgical scars in people who can take a week of visible recovery. | Sun spots, freckles, post-acne marks, tattoo ink, uneven tone in Asian skin when energy is set conservatively. | Fine lines, superficial sun damage and uneven texture in people who want a faster recovery than CO₂; precise work around the mouth and eyes; lighter 'refresh' peels between deeper treatments. |
| In one line | The laser is a controlled injury; the skill is choosing how deep and how dense for this skin, not how much the machine can do. | The variable that matters is depth, not brightness, and pigment already deposited is only half the problem; the inflammation producing it is the other half. | Erbium removes exactly what you tell it to and little more; whether that is better than CO₂ depends on whether you wanted the heat. |
Risks
Redness and swelling for days, crusting, post-inflammatory darkening (common in Fitzpatrick III–V), acne flares, cold-sore reactivation, and rare infection, scarring or lasting hypopigmentation when depth is pushed.
In Singapore
Fractional CO₂ lasers are HSA-registered medical devices and, under MOH's aesthetic practice guidelines, are performed by doctors in Singapore. The DEKA SmartXide Tetra Pro is the platform of our S3 Resurfacing Lift and 4D Scar Reconstruction; IN Eternity Clinic is a designated DEKA Centre of Excellence, disclosed as an interest.
“The laser is a controlled injury; the skill is choosing how deep and how dense for this skin, not how much the machine can do.”
Vetted protocols on the same problem
Questions
How long is the downtime?
Is CO₂ laser safe for Asian skin?
CO₂ or RF microneedling for scars?
Cite this review
Aesthetics International (2026). Fractional CO₂ resurfacing: does it work? Evidence, risks and verdict. https://aesthetics-international.org/treatments/fractional-co2-resurfacing/ (reviewed 1 October 2026).
Editorial, unpaid and independent of any manufacturer. Verdict: Established. See what works and what doesn't across all 153 reviews. Spotted an error or a newer study? Suggest a correction — changes are logged on the corrections page. Terms are defined in the glossary.
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