Patient guide · Recovery · Fractional CO2

CO2 Laser Downtime

Stages of healing, not fixed dates

Fractional CO2 leaves a healing wound. How long it takes depends on depth, density, area and you, so recovery is described in stages. Results vary.

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In Brief

CO2 laser downtime is a staged recovery: redness and oozing, then a bronzed crust, peeling and fading pinkness. It follows fractional CO2 for scars. No fixed number of days is given, because depth, density, area and skin differ. Asian skin carries darkening risk. Results vary.

At a Glance: CO2 Laser Downtime

What it isA patient guide to recovery after fractional CO2 laser.
Stages of healingRedness and oozing, then a bronzed crust, peeling and fading pinkness.
Length of recoveryNo fixed number of days, because depth, density, area and skin differ.
Call the clinicThick, yellow or weepy crusts, blisters or increasing pain.
Main risksAsian skin has a higher risk of post-inflammatory darkening.

What the Research Shows: CO2 Laser Downtime

  • A 2025 systematic review of seven studies reported most patients showing roughly 30% to 70% improvement, with transient redness, swelling and post-inflammatory hyperpigmentation the most common adverse events. [1]
  • A 2022 randomised split-face trial, funded by Beiersdorf, of 59 patients with phototypes III to IV found no significant difference in pigmentation score between sunscreens after picosecond laser. [4]

Figures describe published study groups, which may have used other devices or protocols. They do not predict your result. Updated 3 November 2026.

About This Treatment

The short answer

Fractional CO2 laser creates a real wound, so recovery needs planning. A light pass heals faster than a deep pass over established scars. Depth and density are chosen for each patient and discussed at consultation.

This is why you will not see a fixed number of days here. Please plan around the stages below, and follow the written aftercare you are given.

CO2 laser downtime in stages

01
Treatment day
Redness, swelling, pinpoint bleeding and oozing. Swelling is usually greatest in the first mornings, especially around the eyes, and eases through the day.
02
Following days
Oozing settles. The surface dries to a bronzed, sandpaper-like crust, then flakes and peels to show pink skin.
03
Settling
Pinkness fades gradually. Collagen remodels for longer than the surface takes to close.
04
Review
Healed skin is checked for pigment change, delayed healing and scar response.

What waits, and until when

Activity or productWhen
SunscreenStarts once the skin has re-epithelialised
Make-upAfter the surface has closed and the clinic says it is safe, with mineral products usually first
Exercise, swimming, saunasWait until the surface has closed
Scrubs, exfoliating acids, retinoids, vitamin CPaused until the clinic says to restart
PickingNot at any stage

What is expected, and what needs a call

Expected

Redness, swelling, pinpoint bleeding, clear or straw-coloured oozing, bronzing, crusting, peeling, tightness, itch and pinkness that fades.

Call the clinic

Thick, yellow or weepy crusts, blisters, or increasing pain, swelling or warmth.

Also call

Redness spreading beyond the treated area, fever, or a cluster of small blisters, which may indicate a cold sore.

Looking after the wound

01
Keep it clean
Cleanse with lukewarm water and a very gentle cleanser or plain saline, using fingertips only.
02
Keep it moist
A thin, continuous layer of bland ointment stays on until the surface has closed.
03
Sleep and rest
Sleep face-up with your head raised for the first nights, and change the pillowcase nightly while the surface is open.
04
Keep out of the sun
While the surface is open, use shade and a wide hat. Full details are in CO2 laser aftercare.

Risks in Asian skin

Asian skin has a higher risk of post-inflammatory darkening. Darkening after healing is usually this, and it is reviewed rather than treated over. Sun protection matters in the meantime. The main risk is covered in CO2 laser and Asian skin. A history of cold sores is not a bar, and antiviral cover is started before treatment. Infections and acne-like eruptions can also occur while the skin heals.

Who should wait, and what it cannot do

Who should wait

Pregnancy, active acne, infection or a cold sore in the area, a fresh tan, recent isotretinoin and photosensitising medicines all defer treatment.

Extra caution

A keloid tendency, poorly controlled diabetes, immunosuppression, smoking or active melasma call for care.

What it cannot do

CO2 laser does not clear discrete pigment cleanly, and it does not return skin to an unmarked state. Tethered scars also need release first.

Planning and fees

Allow time around the visible stages, and plan to stay out of the sun. Swelling around the eyes in the first mornings may affect plans. Pinkness is normal unless it spreads or hurts. Deeper passes are used for established scars, including boxcar scars, so these generally need more recovery time than lighter passes. Fee factors are set out in a written plan after assessment, and no prices are listed. Please get in touch to discuss timing.

Frequently Asked Questions

No fixed number of days is given. It depends on depth, density, area and your skin. A light pass heals faster than a deep one.
It is usually greatest in the first mornings, especially around the eyes, and eases through the day.
After the surface has closed and the clinic says it is safe. Mineral products usually come first.
Once the skin has re-epithelialised. Until then, keep out of the sun.
Yes. The surface dries to a bronzed, sandpaper-like crust, then flakes and peels. Do not pick it.
A history of cold sores is not a bar. Antiviral cover is started before treatment.
This is usually post-inflammatory hyperpigmentation. Please contact the clinic. It is reviewed, not treated over, and sun protection matters.
SY
Dr Sin Yong
MBBS (NUS) · MRCS (Edinburgh)
MSc Aesthetic Medicine (QMUL) · MSc Practical Dermatology (Cardiff)
Aesthetic physician registered with the Singapore Medical Council.

Plan your recovery time

Dr Sin Yong will examine you, explain your options and give any fee in writing.

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References

  1. Ptaszek B, et al. The Use of a Fractional Laser in Acne Scar Treatment-A Systematic Review. Life (Basel). 2025;15(6):915. View source · DOI · PMID 40566567
  2. Harnchoowong S, et al. Cosmetic Considerations in Dark-Skinned Patients. Clin Cosmet Investig Dermatol. 2024;17:259-277. View source · DOI · PMID 38321987
  3. Liu Y, Zhang Z, Zhao J Minimally invasive interventions for atrophic acne scars: a PubMed/PMC-based systematic evidence review and exploratory network meta-analysis toward phenotype-guided interpretation. Front Surg. 2026;13:1943995. View source · DOI
  4. Puaratanaarunkon T, Asawanonda P A Randomized, Double Blinded, Split-Face Study of the Efficacy of Using a Broad Spectrum Sunscreen with Anti-Inflammatory Agent to Reduce Post Inflammatory Hyperpigmentation After Picosecond Laser. Clin Cosmet Investig Dermatol. 2022;15:331-337. View source · DOI

Studies may involve other devices or protocols, and they do not predict your own result. See our evidence library and editorial policy.

Related Treatments

Last updated 3 November 2026. General information only. Results vary between individuals. Images are illustrative and do not show patients.