CO2 Laser Scar Revision in Montreal
Deep fractional revision for acne and surgical scars
The Candela CO2RE is the tool we reach for at Reimagine Clinic in Montreal when a scar has depth to it. It is a fractional ablative laser, which means it removes narrow columns of scar tissue rather than warming it. That is what lets it reach the floor of a boxcar or rolling acne scar, or the stiff band of a mature surgical scar, where microneedling and peels run out of depth. Scars are improved, not erased, and we say so at the consultation before anyone books. Our medical director plans every treatment, our specialized cosmetic nurse performs it, and it finishes with exosomes applied into the channels the laser has just opened.




CO2 laser scar revision fast facts
- Cost: Acne Scar Revision (Full Face) $1,199. Spot Treatment / Small Areas $349. Quoted in writing at consultation.
- Device: Candela CO2RE, fractional ablative CO2 laser, Deep mode.
- Treats: Boxcar and rolling acne scars, mature surgical and traumatic scars, flat or depressed burn scars case by case. Not raised or keloid scars, burn scars included.
- Comfort: Medical-grade topical numbing cream applied 45 minutes before, plus device cooling throughout.
- Our protocol: Exosomes applied into the laser micro-channels immediately after the pass, to speed healing and calm inflammation.
- Downtime: 7 to 10 days of social downtime for Deep settings on the face. Body scars heal more slowly and hold redness longer. Read the FAQ before you book.
- Appointment length: About 90 minutes including numbing. A single scar is quicker.
- Results: Each session lifts the scar floor a step. Scars get shallower and softer; they do not disappear. Judged at three to six months.
- Performed by: Specialized cosmetic nurse, under the medical director’s plan and oversight.
CO2 Laser Scar Revision at Reimagine Clinic
Reimagine Clinic runs the Candela CO2RE out of our Plateau-Mont-Royal clinic, and scar revision is where its reach past the gentler devices matters most. This page covers acne scar treatment in Montreal specifically, for atrophic boxcar and rolling scars, plus mature surgical and traumatic scars, and burn scars where the doctor judges them suitable. For everything else the device treats, including skin resurfacing and stretch marks, start at our CO2 laser treatments in Montreal hub.
A scar is a patch of skin that healed wrong, with collagen laid down in a dense, disordered block instead of the loose weave around it. Depressed scars sit below the surface because the injury or inflammation destroyed dermal tissue that was never fully replaced; in rolling scars, fibrous bands also tether the surface down from below. The laser removes narrow columns of the scar tissue and prompts the skin to rebuild them in a more normal pattern. Each session lifts the floor a step. None of that happens in one visit, and no laser makes a scar disappear. What it aims to do is take a scar you notice every morning and turn it into one you have to look for.
For other ways to treat scars and skin texture, see all our laser treatments.
How the CO2RE works on a scar
The CO2RE is a fractional ablative laser. Ablative means it vaporizes tissue rather than heating it from underneath, which is what gives it reach into the dermis where scar tissue lives. Fractional means it treats a grid of microscopic columns and leaves untouched skin between them to drive the healing. The American Society for Dermatologic Surgery covers the general principles of laser resurfacing if you want independent background.
The device runs four modes. Light works through the epidermis as a refresh and Mid drives deeper for moderate photodamage and lines; both are resurfacing settings. Fusion treats a superficial pattern and a deep spike in one pass. Scar revision is Deep mode work: narrow columns driven well into the dermis and spaced sparsely, so the skin between them can rebuild each column with fresh, better-organized collagen. On a boxcar or rolling scar the columns go through the scar floor and the healing lifts it. On a mature surgical scar they break up the stiff band so it can soften and flatten into the skin around it. The nurse adjusts depth and density scar by scar, within the parameters the doctor has set, instead of running one setting across the whole face.
Why we finish every session with exosomes
When the laser pass ends, the treated scars are covered in thousands of open micro-channels running into the dermis. They close quickly. That short window is the only moment when something applied topically can reach the depth where healing is being decided, and most protocols waste it.
We use it. Immediately after the pass we apply exosomes into those channels. Exosomes are extracellular vesicles carrying growth factors and signalling proteins, and delivering them into open channels rather than onto intact skin is what makes the difference between a treatment step and an expensive serum. For scar work the intent is twofold: calm the inflammatory response so the redness and crusting phase is shorter and easier, and support the repair happening in the dermis, which is where the scar is being rebuilt. You can read more about how we use them on our exosomes treatment page.
What that means in practice: the downtime is still mandatory and you should still plan for it. Our patients typically describe the redness settling sooner and the whole process being more tolerable than the accounts they have read of standard CO2 recovery. We would rather set that expectation honestly than promise you a number.
Which scars we treat, and which we send elsewhere
CO2 scar revision earns its place on depressed scars with depth to them:
- Boxcar acne scars, the sharp-walled pits left by inflamed acne. Deep mode suits these well.
- Rolling acne scars, the broader, softer dents tethered from below. They respond too, though where the tethering is strong the doctor may recommend subcision alongside the laser.
- Ice-pick scars, the narrow deep punctures. Of all the scar types, these respond least to any laser, and they often need other techniques first or alongside.
- Mature surgical and traumatic scars, once fully healed, where the band is stiff, sunken, or sits in a line the eye follows.
- Burn scars, case by case, after the doctor has examined them. Raised or thickened burn scars fall under the raised-scar rule and are not treated with CO2 here; flat or depressed mature burn scars may be.
It is the wrong tool for plenty of scars, and a week of downtime is a steep price for a problem a gentler device handles well. Raised, thickened or keloid scars are not treated with CO2 here. They are a contraindication: the laser creates a controlled wound, and your skin has already shown how it heals one. Early or mild texture change is better met by microneedling or RF microneedling, which cost you little or no downtime. Redness in a scar is a vascular problem and belongs to a vascular laser. Active acne needs to be treated and quiet first, because lasering over live lesions raises infection risk and the breakouts are still making new scars. If you are not sure which category you are in, our scarring concern page walks through the types.
Are you a candidate?
The people who do best with CO2 scar revision have mature, depressed scars rather than fresh ones, acne that has been quiet for months, realistic expectations about what a series achieves, and a calendar with room in it. That last one matters more than people expect. Someone who cannot protect a week of recovery, or who knows they will be back outdoors in the sun immediately, will get a worse result from this laser than from a treatment they can actually accommodate.
Skin tone matters too. Deeper Fitzpatrick types carry a genuine risk of post-inflammatory hyperpigmentation with ablative lasers, and a dark patch where a scar used to be is not a trade most people want to make. The honest answer is often a modified conservative approach with pre-treatment, or a different treatment entirely, such as RF microneedling. Our medical director makes that call at the consultation, and she will tell you plainly which category you fall into.
Book a scar revision consultation in Montreal
The consultation is where this starts. Our medical director will examine your scars, tell you honestly whether the CO2RE is the right treatment for them or whether something gentler will get you there, and give you the likely session range, the written quote and the recovery timeline before you decide anything. Call 438-686-8460 or book through the form below.
Reimagine Clinic is at 3554 Avenue Coloniale in Plateau-Mont-Royal, and we see scar revision clients from across Montreal, Laval and Longueuil. You can see the rest of what the CO2RE treats, including CO2 laser skin resurfacing, on our CO2 laser hub.
Who should avoid CO2 laser scar revision?
You are not a candidate for CO2 laser scar revision, or will need medical clearance first, if any of the following apply:
- Pregnancy or breastfeeding.
- Active acne, an active infection, or an open cold sore in the treatment area. Acne needs to be quiet before we treat the scars it left.
- Recent isotretinoin. The doctor will tell you how long to wait.
- Raised, hypertrophic or keloid scars, or a history of them. The treatment creates a controlled wound, and your skin has already shown how it responds to wounds. These scars are not treated with CO2.
- Deeper skin tones, which carry real post-inflammatory pigmentation risk and need either a conservative modified approach with pre-treatment or a different treatment.
- Conditions or medication that impair wound healing, including immunosuppression, poorly controlled diabetes, and some autoimmune and connective tissue disorders.
- Recent sun exposure or an active tan in the treatment area.
- An inability to commit to strict sun avoidance through the healing period.
Essential aftercare after CO2 scar revision
Aftercare is not optional here, and it is not light. What you do in the first ten days determines a good part of your result, and on body scars the window runs longer:
- Vinegar or saline soaks. Dilute white vinegar or sterile saline soaks several times a day through the weeping and crusting phase, exactly as we prescribe. They keep the surface clean, lift debris gently, and lower infection risk.
- Heavy occlusive barrier. Aquaphor or the equivalent, applied thickly and reapplied through the day and night. Healing skin has no barrier of its own and must not be allowed to dry out. Nothing with acids, retinoids, vitamin C, fragrance or exfoliants until we clear you.
- Do not pick. At all. Not the crusts, not the flakes, not the piece that looks ready to come off. Picking is the most common cause of a bad outcome from this treatment, and on a scar it can mean a new scar on top of the old one.
- Absolutely zero sun exposure. Not reduced. Zero, through healing, then rigorous SPF 50 and a hat for months afterwards, in line with Canadian Dermatology Association sun protection guidance.
- Sleep elevated for the first few nights after a facial session to limit swelling.
- No exercise, saunas, hot showers, swimming pools or alcohol while you are healing. Heat and blood flow make the swelling worse.
- No makeup until the peeling has finished and we have cleared you.
You leave with written instructions and the products you need, and we check in during the healing window.
Safety and side effects
Expected effects of CO2 laser scar revision, which are part of the treatment rather than complications:
- Intense heat and tightness for the first several hours.
- Redness and swelling peaking in the first 48 hours, often worst around the eyes on waking after a full-face session.
- Clear or yellowish weeping in the first day or two.
- Bronze or brown micro-crusting, then heavy uneven peeling. Treated scars look darker and more obvious at this stage, before they look better.
- Pink or ruddy tone lasting weeks to a few months, and longer on body scars than on the face.
- Temporary itching as the skin knits together.
Less common risks, which is why this is run as a medical procedure: post-inflammatory hyperpigmentation, particularly in deeper skin tones or with any sun exposure during healing; infection, including reactivated cold sores, which is why antiviral cover is prescribed; prolonged redness; and scarring, which is rare but real and is most often linked to picking or to infection during healing. Call us rather than waiting if anything looks or feels wrong.
Protecting your result long term
The laser starts the process. What you do between sessions and afterwards decides how much of the result you keep:
- Daily broad-spectrum SPF 50, permanently. New skin over a treated scar pigments easily, and a dark patch is harder to correct than the scar was.
- Keep acne controlled. Every new inflamed breakout can leave a new scar behind the ones we are treating. Tell us if it flares between sessions.
- Retinoids once we clear you, usually several weeks out, to keep collagen turnover going.
- Antioxidants in the morning under sunscreen.
- Complete the series at the spacing the doctor sets. Each session builds on the last.
- Judge each session at three to six months, not at two weeks. Collagen remodelling inside each column runs long after the redness fades.
“Meet the doctor behind your treatment plan.”

What CO2 scar revision corrects
How can CO2 laser scar revision help you?
Boxcar and rolling acne scars
Boxcars have sharp walls and a flat floor; rolling scars are broader, softer dents tethered from below. In both, the problem sits in the dermis, where creams and peels never reach. Deep-mode columns go through the scar floor, and as each column heals it fills with new collagen and lifts the floor a step. Over a series the aim is for the pits to shallow out and the surface to catch light more evenly. Shallower and softer, not gone. These are the scars the CO2RE does its best work on.
Ice-pick scars, with honest limits
Ice-pick scars are narrow, deep punctures, often deeper than they are wide. They respond least to any laser, this one included, and a series built around them alone would disappoint. We treat them as part of a scarred face, and the surface around them can improve, but they rarely disappear and often need other techniques first or alongside. We would rather tell you that before you book a series than after.
Surgical and traumatic scars
A mature scar from surgery, a cut or an accident is a stiff band of dense collagen. It heals sunken, uneven at the edges, or both, and it draws the eye because it runs in a straight line. Deep-mode columns break up that band so the skin can rebuild it in a looser, more normal pattern. The aim is a scar that is softer, flatter and closer to the skin around it. Improved, not erased. Fully healed scars only. A fresh scar is still remodelling on its own and needs time first.
Burn scars, case by case
Burn scars vary more than any other kind, in depth, texture and how the surrounding skin healed, so no single setting suits them all. Raised or thickened burn scars fall under the raised-scar rule and are not treated with CO2 here. For flat or depressed mature burn scars, the doctor examines each one at the consultation and decides whether fractional CO2 can help, at what depth, and whether to start conservatively. Where it fits, the aim is softer texture, a flatter surface, and a scar that is easier to live with, though still there.
Our CO2 laser scar revision protocol
Consultation with the doctor
You complete the intake and consent forms, then meet our medical director. She examines your scars, works out which types you have and how deep they sit, goes through your medications and history, and decides whether an ablative laser is the right instrument for them. Active acne, recent isotretinoin, a history of keloid scarring, or a deeper Fitzpatrick skin type all change the plan or rule the treatment out. If you are cleared she writes the prescription, sets the treatment parameters, and gives you a realistic session range and a written quote. In Quebec that step is the law, not a formality.
Medical-grade numbing
Comfort is planned, not improvised. On treatment day the nurse cleans and photographs the scars under consistent light, so there is a true baseline to compare against later, then applies a medical-grade topical anaesthetic cream and leaves it to work for around 45 minutes under occlusion. You will feel heat and a prickling snap during the pass, but the numbing plus the device cooling keeps it well inside what people tolerate. Build the extra 45 minutes into your day, and arrive without makeup so we are not spending it cleansing.
The laser pass
Our specialized cosmetic nurse performs the treatment at the settings the doctor has set, working in Deep mode with sparse columns and adjusting depth and density scar by scar instead of running one pattern across the face. A full face of acne scarring takes roughly 30 to 45 minutes of laser time; a single surgical scar is much quicker. You will smell something during the pass, and afterwards the treated skin looks and feels like a strong sunburn. Arrange your ride home in advance.
Exosomes, immediately after
This is the step that sets our protocol apart. The moment the laser pass finishes, each treated scar holds thousands of open micro-channels, and that window does not stay open long. We use it to apply exosomes directly into those channels, so the growth-factor signalling reaches the dermis where the scar is being rebuilt, instead of sitting on the surface the way a post-treatment serum would. The aim is to calm the inflammatory response and get you through the crusting and peeling phase faster and more comfortably than standard CO2 recovery. You still have real downtime. It is simply shorter and easier to live through.
what makes us different?
Professionals in CO2 scar revision
Innovation and Expertise
Reimagine Clinic combines current medical treatments with personalized care, so each patient gets the best possible result. Our team uses up-to-date techniques and technology, with a strong focus on your overall wellness and satisfaction.
Excellent in Patient Care
Shannon, our esthetician in Montreal, is one of the best trained in the industry. She holds three certifications, as an Esthetician, an Advanced Esthetician and a Medical Esthetician, and keeps learning across esthetic disciplines to give every client personal, high-quality care.
Integrity and Transparency
We offer treatments for many beauty and medical needs: facials from classic care to chemical peels and microneedling, skin lesion removal, laser and IPL treatments, cosmetic injections and permanent makeup, plus body treatments and lash and brow services.
we’re here to answer all your CO2 scar revision questions
It depends on how many scars there are, where they sit, and how many sessions the doctor thinks they need. Full-face acne scar revision is $1,199. A spot treatment for one scar or a small cluster, such as a single surgical scar, is $349. The consultation is $100. Across Montreal, CO2 work runs from around $300 for small areas to $2,500 for full-face deep work, and scar revision sits inside that range.
You get a written quote at your consultation once the doctor has examined your scars and set out the likely number of sessions. Ask for it to include the aftercare products, which are not optional with this treatment.
Plan for 7 to 10 days of social downtime for a full-face Deep session, which is what acne scar revision usually is. Not two days, and not a long weekend. A spot treatment on one scar is a smaller wound and easier to hide, though the treated area goes through the same stages. Scars on the body heal more slowly than the face and hold redness longer, so plan for more time there.
Our exosome protocol makes that window shorter and considerably more comfortable than standard CO2 recovery, but it does not remove it. Book against a quiet stretch of your calendar, and take the time off before you book rather than after.
Days 1 to 3. Significant redness and swelling, and a sensation like a severe sunburn. The heat is most intense in the first few hours. Swelling peaks in the first 48 hours and is usually worst around the eyes when you wake up after a facial session. The skin weeps a clear or yellowish fluid. You will be doing soaks and reapplying ointment constantly, and you will not want to be seen.
Days 4 to 7. The weeping stops and the surface dries into fine bronze or brown micro-crusting with a sandpaper feel. The treated scars look darker and more obvious than before, which surprises people. Then heavy peeling begins, coming away in uneven patches with bright pink new skin underneath. This is the stage people find hardest to look at, and it is also the stage where the exosomes earn their place.
Week 2 onward. Peeling finishes and the pinkness starts fading. Most people are covering what remains with mineral makeup and back to normal life. A pink tone can persist for several weeks to a few months, longer on the body, which is normal.
Months 1 to 6. The actual result builds as collagen fills each column and the scar floor lifts. What you see at two weeks is not the outcome.
Almost always more than one. Each Deep session removes and rebuilds a fraction of the scar and lifts the floor a step, so a series spaced several weeks to a few months apart is the normal course for acne scarring. Rolling and boxcar scars usually respond well, though tethered rolling scars sometimes need subcision alongside the laser; ice-pick scars respond least; and a single mature surgical scar may need less than a scarred face.
The doctor gives you a realistic range at the consultation, because the plan gets adjusted once we see how your skin responds to the first treatment. If that session shows your scars are not responding the way we expected, the plan changes rather than booking more of the same.
Both have defined roles. Our medical director, Dr. Danielle Eiböck, conducts the consultation, assesses your scars and medical history, decides whether you are a candidate, writes the prescription and treatment parameters, and provides medical oversight for your course of treatment. The CO2RE sessions themselves are performed by our fully trained, specialized cosmetic nurse, who works to the plan the doctor has set and adjusts depth and density scar by scar within it. You meet the doctor at consultation and see the nurse for your treatments.
Reach and recovery. Microneedling and RF microneedling create controlled injury with needles, and with heat in the case of RF, and they work well on early or mild texture change and shallow scarring with little or no downtime. They need a course of sessions and they do not remove tissue.
CO2 vaporizes columns of the scar itself and reaches the floor of a boxcar or the band of a surgical scar, which is why it improves scars the gentler devices cannot, and why it takes a week of your life to recover from. If your scarring is mild, the gentler route is the better trade. If you have already tried it and the improvement never held, that is usually the signal you need this instead. Deeper skin tones are sometimes steered to RF microneedling for pigment safety even when the scars themselves would suit CO2.
Absolute. Zero direct sun while you are healing, then rigorous protection for months. New skin over a treated scar has almost no defence against ultraviolet light, and exposure causes post-inflammatory hyperpigmentation. A brown patch where a scar used to be is harder to correct than the scar was, and it can be permanent.
In practice that means staying indoors and away from windows early on, then broad-spectrum SPF 50 every day once we clear you to apply it, reapplied through the day, with a wide-brimmed hat. This holds on cloudy days and through winter. It also rules out beach holidays, ski trips and tanning for the period we specify, and because scar revision is a series, that period repeats with each session. If you have something booked, tell us at the consultation and we will schedule around it.
You risk a new scar on top of the one we are treating, and you risk infection. The crust is a temporary barrier over a wound that has not closed. Pulling it off early tears skin that is still knitting together, and picking is the single most common cause of a poor outcome from CO2 treatment. On a scar that is a particular waste, because the whole point of the session was to rebuild that tissue neatly.
It will itch, sometimes intensely, and it will look ready to come off before it is. Keep it greasy, since ointment reduces the itch, and let every piece fall away on its own. If the itching becomes unbearable, call us instead of touching it.
The real result arrives months after the peeling stops. Once the crusting comes away the skin looks pinker and smoother, and the scars often look shallower already, partly because of swelling that then settles. The lasting change comes as collagen rebuilds inside each column over three to six months, and it stacks session by session.
Judge each session at three to six months, not at two weeks, and judge the course at the end of it. We photograph every visit under the same light so you can compare against where you started, because the eye forgets what a scar used to look like once it has improved.
No, and be wary of anyone who says otherwise. People search for laser scar removal, and we understand why, but the honest word is revision. A scar is skin that has already healed once, in a disordered pattern, and no laser turns it back into skin that was never injured.
What CO2 does is remove and rebuild part of that tissue in each session, so the scar becomes shallower, softer at the edges and closer in texture and colour to the skin around it. Improved, not erased. The aim is the difference between a scar you think about and one you forget. Whether that trade is worth a week of recovery is your call, and we will give you an honest read on your odds at the consultation. If what you need is a scar gone entirely, we will tell you there that this treatment cannot promise it.
Not until the acne is quiet. Lasering over inflamed lesions raises the infection risk across an open surface, and the breakouts you have now are still making new scars behind the ones we would be treating.
The doctor will look at where your acne stands at the consultation. If it is still active she will want it under control first and will book the laser once your skin has been clear for a stretch. If you have recently finished isotretinoin, there is also a waiting period before any ablative laser, and she will tell you how long.
No. Raised, hypertrophic and keloid scars are a contraindication for CO2 here, and a history of keloids rules the treatment out even for a depressed scar elsewhere. The laser works by creating a controlled wound and relying on your skin to heal it neatly. Skin that has already responded to injury by overproducing scar tissue is the one kind of skin that cannot be trusted to do that, and the result can be a bigger, thicker scar than you started with.
The doctor can discuss what is appropriate for a raised scar at the consultation. CO2 scar revision is for depressed scars: acne pits, sunken surgical lines, and traumatic scars that sit below the surface.
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info@reimagineclinic.ca
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438-686-8460