For atrophic acne scars, static skin creases and enlarged pores, fractional CO2 laser resurfacing remains one of the most evidence-backed treatments in dermatology. Fractional CO2 lasers uses controlled, fractional ablation to trigger structured wound healing and collagen remodelling.
In The Skin Longevity Clinic, the goal is optimising results and safety with the right depth, density, and recovery plan—especially for Asian skin where pigment biology matters.
Medically reviewed by Dr Rachel Ho, MBBS, MRCS, MMed (ENT), 10 October 2026.
Fractional CO2 laser is an ablative fractional resurfacing treatment. “Ablative” means it vaporises microscopic columns of skin; “fractional” means it treats only a fraction of the surface in a grid-like pattern, leaving surrounding skin intact to speed healing.
Medical reviews describe ablative fractional CO2 as creating thousands of micro-ablative zones and micro-thermal zones, which drives repair and collagen remodelling—one reason it’s long considered a gold-standard resurfacing option for scars and wrinkles.
Fractional CO2 is most commonly to treat:
Fractional CO2 laser causes precision-controlled wound healing through these mechanisms
This micro-zone concept is a core mechanism described across resurfacing reviews and modern clinical literature.
Fractional CO2 laser is one of the most studied treatments for atrophic acne scars1,4. In the trials summarised by a Cochrane review, fractional CO2 laser and RF microneedling improved scars to a similar degree, but redness lasted about ten days after the laser compared with under a week after radiofrequency, and about one in three patients developed temporary darkening on the laser-treated side1. A 2026 network meta-analysis of 56 randomised trials found that combinations, such as fractional CO2 laser with subcision, generally outperformed single treatments2.
Fractional CO2 laser works best on boxcar scars, shallow atrophic scars and uneven texture. Tethered rolling scars usually also need subcision, and narrow ice pick scars respond better to TCA CROSS4. Our acne scar treatment guide explains how each scar type is planned.
| Fractional CO2 laser | RF microneedling | |
|---|---|---|
| How it works | Ablates microscopic columns of skin | Heats the dermis through insulated needles, largely sparing the surface |
| Typical redness | About 1 week | A few days |
| Temporary darkening (PIH) | More common1 | Less common1 |
| Often chosen for | Boxcar scars, deeper texture change | PIH-prone skin, scars with laxity |
Both can be combined with subcision. Our RF microneedling vs pico laser vs fractional CO2 comparison covers the choice in more detail.
Post-inflammatory hyperpigmentation is the main concern after ablative laser in Asian skin1. At The Skin Longevity Clinic, settings are kept conservative and treatment is staged over more sessions rather than fewer, aggressive ones. Pigment care starts before treatment where indicated, and strict sun protection follows.
Most acne scar programmes at the clinic involve 3 to 6 sessions, spaced to allow healing and collagen remodelling between treatments. Improvement continues for several weeks after each session, so results are reviewed after remodelling rather than in the first week.
Treatment is postponed if there is active acne, infection or a tan. A history of cold sores is discussed beforehand, because laser resurfacing can trigger a flare. Recent isotretinoin use does not automatically rule out fractional ablative laser; a 2017 consensus found insufficient evidence to justify routinely delaying it3. Timing is decided individually.
Cost: fractional CO2 laser is quoted after consultation. The quote reflects the treatment area, the number of sessions and any combined procedure.
A typical treatment plan includes:
Yes, plan for recovery of about a week’s duration for fractional CO2 laser.
Common downtime pattern:
Clinical acne-scar studies support improvement across multiple sessions, with incremental gains.
Yes, fractional CO2 laser treatments can combined with other modalities for skin resurfacing and rejuvenation.
Examples:
When performed by experienced doctors with appropriate patient selection and aftercare, fractional CO₂ is widely used and generally safe. The most common side effects are expected and temporary (redness, swelling, crusting, PIH risk).
Important risks to know:
Fractional CO2 laser is an effective and safe laser for remodelling skin structure to treat depressed scars, wrinkles and enlarged pores. Evidence for fractional CO2 laser is supported by clinical studies and long-standing dermatology experience.