Acne can clear up and still leave its mark. For many people it is the texture left behind, the pitted or uneven scarring, that proves hardest to remove. If creams and time have not made much difference, CO2 laser for acne scars is one of the more powerful in-clinic options worth understanding. This guide explains what CO2 laser resurfacing does, which acne scars it suits, how many treatments to expect, what recovery looks like, what affects the cost, and whether the results last. As with any procedure, the right approach depends on your skin.
What Are Acne Scars?
Not every pigmentation left by acne is a scar. Flat red or brown marks, often called post-inflammatory erythema or pigmentation, usually fade on their own or respond to lighter treatments. True acne scars are changes in the skin’s texture, and they generally fall into different categories: ice pick scars (narrow, deep pits), boxcar scars (wider depressions with defined edges) and rolling scars (broad, wave-like undulations). These atrophic scars form when acne disrupts collagen as the skin heals. Because they are textural rather than just discolouration, they usually need a treatment that resurfaces and rebuilds the skin rather than one that only targets colour.
What Is CO2 Laser Resurfacing?
CO2 (carbon dioxide) laser resurfacing is an ablative laser treatment. Treatments, including the CO2 laser resurfacing we offer, use a fractional approach: the laser delivers energy in tiny columns across the skin, treating a fraction of the surface at a time. That controlled injury does two things. It removes damaged surface tissue, and it triggers the skin’s wound-healing response, stimulating new collagen over the following weeks and months. Clinical research has found fractional CO2 laser to be an effective treatment for atrophic acne scars, working largely through this collagen remodelling.
How CO2 Laser Helps Treat Acne Scars
Acne scars are a breakdown in collagen, rebuilding collagen is the goal. As new collagen forms, the base of a depressed scar can be rebuilt and its edges soften, so the skin looks and feels smoother and even. CO2 laser tends to suit atrophic scars, boxcar scars and rolling scars in particular. Very narrow or very deep scars can be more stubborn and may need a combined, or a tailored laser treatment, approach.
CO2 Laser for Deep Acne Scars
Deep acne scars often respond best to a combination rather than a single treatment. Depending on your skin, that might mean pairing CO2 laser with techniques such as subcision (releasing the tethered base of a scar) or skin needling, with multiple sessions spaced to let the skin remodel in between. Results build gradually, and deeper scars usually improve rather than disappear entirely. Your clinician will set realistic expectations for your specific scarring at consultation.
How Many Treatments Will You Need?
Some people see a worthwhile change from a single session, while more pronounced or deeper scarring usually needs a series spaced several weeks to months apart, so collagen can remodel between treatments. The number depends on the type and depth of your scars, your skin and how it responds. You will get a clearer plan once your scars have been assessed in person.
What to Expect: Treatment and Recovery
CO2 laser is an ablative treatment, so it does involve downtime. Beforehand you will have an assessment, and you may be asked to avoid sun and certain products in the lead-up. During the session, numbing is used for comfort, and the treatment time depends on the area being treated.
Downtime and Aftercare
In the days after, expect redness and some swelling, followed by peeling or flaking as the surface renews, usually over about a week. Diligent aftercare and sun protection are essential while the skin heals, and new collagen keeps forming for months, so the final result takes time to show. We have a full guide to post-CO2 laser care.
Is CO2 Laser for Acne Scars Permanent?
When CO2 laser improves a scar, it does so by building new collagen, and that structural change can be long-lasting. Results vary from person to person, deeper scars may improve rather than vanish, and remove acne scars permanently.
How Much Does CO2 Laser for Acne Scars Cost?
Cost depends on several things: the number and depth of the scars, the size of the area treated, how many sessions you need, and whether CO2 laser is combined with other treatments. Because those factors vary so much between people. We discuss pricing openly at your consultation, once your scars have been assessed and a plan mapped out, so you know what to expect before committing to anything.
CO2 Laser vs Other Acne Scar Treatments
CO2 laser is one of several options, and the best choice depends on your scar type, skin and how much downtime you can accommodate. Skin needling stimulates collagen with less downtime and can suit milder scarring or be combined with laser. Other laser options, including our Er:YAG iPixel resurfacing, offer different depths of treatment, and chemical peels can refine surface texture and tone. For flat red or brown pigmentation rather than true scars, a light-based option is usually more appropriate than resurfacing. The point of an assessment is to match the treatment, or combination, to your skin rather than fitting your skin to one treatment.
Is CO2 Laser Right for You?
CO2 laser tends to suit people with textured, atrophic acne scarring who can accommodate some downtime. Pregnancy and some medications can also affect suitability. A consultation, where your skin and scars are assessed and any risks are explained.
Frequently Asked Questions
Is CO2 laser good for acne scars?
For textured, atrophic acne scars (ice pick, boxcar and rolling scars), CO2 laser resurfacing is an established option. It works by removing damaged surface tissue and stimulating new collagen, which can soften the appearance of depressed scars. It is less relevant for flat red or brown marks, which are usually better suited to lighter, light-based treatments. Results vary from person to person.
How many CO2 laser sessions do you need for acne scars?
Some people see a worthwhile improvement from a single session, while deeper or more widespread scarring usually needs a series spaced several weeks to months apart. The number depends on your scar type and depth and how your skin responds, and it is confirmed once your scars are assessed.
Is CO2 laser for acne scars permanent?
The collagen a scar rebuilds after CO2 laser is a lasting structural change, so improvements can be long-lasting. However, it is not accurate to call it permanent: results vary, deeper scars may improve rather than disappear. Ongoing skin care and sun protection help maintain the result.
How much does CO2 laser for acne scars cost?
Cost depends on the number and depth of your scars, the area treated, how many sessions you need and whether it is combined with other treatments. Pricing is discussed openly at your consultation once your scars have been assessed.
What is the downtime after CO2 laser for acne scars?
Expect redness and some swelling in the first few days, followed by peeling or flaking as the surface renews, usually over about a week. Sun protection and careful aftercare are essential while the skin heals, and collagen keeps building for months, so the final result develops over time.
Does CO2 laser work on deep acne scars?
It can help, but deep acne scars often respond best to a combination approach rather than laser alone, for example pairing CO2 laser with subcision or skin needling across spaced sessions. Deeper scars generally improve rather than disappear entirely, and realistic expectations are set at your assessment.
CO2 laser or skin needling for acne scars?
Both stimulate collagen. Skin needling is gentler with less downtime and can suit milder scarring, while CO2 laser resurfaces more deeply and can suit more pronounced textural scarring. They are sometimes used together. The right choice depends on your scar depth, skin and downtime tolerance.
Acne scars can feel like the last hurdle once the acne itself has settled, but textured scarring often responds well to the right resurfacing plan. CO2 laser is a powerful option for atrophic acne scars, and it works best when it is matched to your skin, sometimes on its own and sometimes alongside other treatments. If you would like to know whether CO2 laser resurfacing suits your scarring, book a consultation with our team in Wollongong. We will assess your skin, explain your options and set realistic expectations before you decide on anything.