Laser scar treatment is one of those things that works remarkably well in the right context and underwhelms in the wrong one. The gap between "this changed my skin" and "I spent $3,000 and noticed nothing" usually comes down to three things: the type of scar, the type of laser, and whether the provider matched the two correctly.
This guide covers what laser treatments actually do to scar tissue, which lasers work for which scars, what recovery looks like, and how to evaluate whether it's worth it for your specific situation.
How Laser Scar Treatments Work
Lasers treat scars through two primary mechanisms, depending on the technology used.
Ablative lasers remove the outer layers of skin entirely. By destroying controlled columns of tissue, they trigger the wound-healing response — the body produces new collagen and rebuilds the skin surface. The result, after healing, is smoother, more even skin. The tradeoff is downtime: ablative treatments can require 1–2 weeks of recovery.
Non-ablative lasers deliver heat energy beneath the skin surface without removing it. They stimulate collagen remodelling without breaking the skin barrier. Recovery is minimal — some redness and swelling for a day or two — but multiple sessions are usually required, and results are more gradual.
Fractional lasers (both ablative and non-ablative) are the current standard for scar treatment. Rather than treating the entire skin surface, fractional lasers create thousands of microscopic treatment zones surrounded by untreated tissue. The untreated zones accelerate healing and reduce recovery time while still delivering the collagen-stimulating benefit across the treated area.
Types of Scars and Which Lasers Work
Not all scars respond equally to laser treatment, and some respond better to other modalities entirely.
Atrophic Acne Scars (Ice Pick, Boxcar, Rolling)
These are the depressed scars left by inflammatory acne — the ones that create divots, craters, or broad depressions in the skin surface. They're caused by collagen destruction during the healing process.
Ice pick scars are narrow and deep. They respond poorly to laser alone — TCA cross (trichloroacetic acid applied precisely to the scar base) is usually the first-line treatment, followed by fractional laser to address surrounding texture.
Boxcar scars have defined, sharp edges and a flat base. Fractional CO2 or erbium laser works well here, typically showing 30–70% improvement over 3–4 sessions.
Rolling scars have a wave-like appearance caused by fibrous bands pulling the skin down. Subcision (a minor procedure that breaks the fibrous bands) should precede laser treatment — laser alone won't address the underlying tethering.
Best laser options: Fraxel Repair (fractional CO2), PicoSure, Clear + Brilliant, PiXel8-RF (radiofrequency microneedling, not strictly a laser but often grouped with laser treatments)
Hypertrophic Scars (Raised, Red)
Hypertrophic scars occur when the body produces too much collagen during healing. They remain within the boundary of the original wound and often improve on their own over 1–2 years, though treatment can accelerate this.
Pulsed dye laser (PDL) is the gold standard here. It targets haemoglobin in the blood vessels that feed the scar, reducing redness and flattening the tissue. Multiple sessions spaced 4–6 weeks apart typically produce 50–80% improvement.
Keloid Scars (Raised, Extends Beyond Wound)
Keloids extend beyond the original wound boundary and can continue growing. They're significantly more common in people with darker skin tones and have a genetic component.
Laser alone is generally insufficient for keloids and can sometimes trigger regrowth. Standard treatment is a combination of corticosteroid injections and pulsed dye laser, often with surgical excision for larger keloids followed by radiation to prevent recurrence.
If you have keloid-prone skin, consult a dermatologist before any laser procedure — even non-scar-related laser treatments can trigger keloid formation at treatment sites.
Post-Inflammatory Hyperpigmentation (PIH)
PIH is flat discolouration — the dark marks left after acne or skin injury — and is technically not a scar (no structural change to the skin). It's included here because it's frequently confused with scarring and often searched alongside scar treatments.
For PIH, laser is usually not the first-line treatment and carries meaningful risk of worsening hyperpigmentation in darker skin tones. Topical brightening agents (niacinamide, tranexamic acid, alpha arbutin, azelaic acid) combined with consistent SPF are safer, cheaper, and effective for most PIH. If those fail, a gentle non-ablative laser or chemical peel with a practitioner experienced in treating darker skin tones may be appropriate.
Common Laser Technologies for Scar Treatment
Fraxel (Fractional CO2 and Erbium)
The most studied fractional laser for acne scarring. CO2 is more aggressive (more downtime, more results per session); erbium is gentler with slightly less dramatic results per session but faster recovery.
Cost: $1,000–$3,000 per session. Typically 2–4 sessions for significant improvement.
Pulsed Dye Laser (PDL / Vbeam)
Best for red, raised, or vascular scars. Not the right choice for atrophic acne scars.
Cost: $300–$600 per session. 3–5 sessions common for hypertrophic scars.
PicoSure / PicoWay (Picosecond Lasers)
Deliver energy in ultra-short pulses, stimulating collagen without thermal damage. Less downtime than CO2, particularly useful for pigmentation concerns alongside scarring.
Cost: $500–$1,500 per session.
Microneedling with Radiofrequency (RF Microneedling)
Not technically a laser but commonly grouped with laser treatments. Delivers radiofrequency energy through microneedles at a controlled depth. Works well for rolling and boxcar scars. Lower risk in darker skin tones than ablative lasers.
Cost: $800–$2,000 per session.
What Recovery Looks Like
Recovery varies substantially by treatment type.
Non-ablative (Vbeam, PicoSure, Clear + Brilliant):
Redness and mild swelling for 24–48 hours. Most people return to normal activities immediately. Makeup can typically be worn within 24 hours.
Fractional non-ablative (Fraxel Dual):
Redness, mild swelling, and a sandpaper-like texture to the skin for 3–5 days. Skin may feel tight. Return to work: 3–5 days for most people.
Fractional ablative (Fraxel Repair, CO2):
More significant. Redness, swelling, oozing, and skin peeling for 7–14 days. Full redness fades over several weeks to months. Social downtime is real — most people take 1–2 weeks off.
During recovery from any ablative treatment: no active skincare ingredients, no makeup (until the provider clears you), SPF every day without exception, and no sun exposure.
Laser Treatment and Skin Tone
This is where provider selection becomes critical.
Ablative and certain non-ablative lasers carry a real risk of post-inflammatory hyperpigmentation and, in some cases, permanent hypopigmentation (loss of pigmentation) in melanin-rich skin tones (Fitzpatrick IV–VI). A laser that's routine in a light-skinned patient can cause lasting skin damage in a darker-skinned one.
This is not a reason to avoid laser treatment if you have a deeper skin tone — it's a reason to specifically seek a provider with documented experience treating your skin tone. Look for board-certified dermatologists or plastic surgeons, not med spas with minimal training. Ask specifically: "How many patients with my skin tone have you treated with this laser, and can you show me examples?"
Safer options for darker skin tones include RF microneedling, Nd:YAG lasers, and non-ablative fractional treatments at conservative settings.
Is It Worth It?
Honest answer: for the right scar type with an experienced provider, laser treatment is one of the most effective interventions available — significantly more effective than topical treatments alone. For the wrong scar type, or with an undertrained provider, it's expensive and potentially harmful.
Before booking anything:
- See a board-certified dermatologist (not a med spa) for an evaluation
- Confirm the scar type — not all depressions are boxcar scars, not all redness is hypertrophic
- Ask about combination approaches — subcision, TCA cross, and microneedling often precede or complement laser
- Get a realistic expectation — "improvement" not "elimination" is the honest outcome
- Budget for multiple sessions — one session rarely produces the full result
Frequently Asked Questions
How many laser sessions do I need?
Typically 3–6 for atrophic acne scars, spaced 4–8 weeks apart. Hypertrophic scars may respond in 3–5 pulsed dye sessions. Results compound across sessions — each one builds on the last.
Does laser scar treatment hurt?
Most treatments involve topical numbing cream applied 30–60 minutes before. Non-ablative treatments are often described as a snapping sensation. Ablative CO2 treatments are more uncomfortable — expect heat and pressure even with numbing.
How much does laser scar treatment cost?
Range is wide: $300–$3,000 per session depending on the technology and the practice. Most scar treatment requires multiple sessions, so budget accordingly. Cosmetic procedures are not covered by insurance.
Can I use retinol or acids while undergoing laser treatment?
Discontinue retinoids and exfoliating acids 1–2 weeks before and after each session. Your provider will give specific guidance. Don't resume actives until the skin barrier has fully recovered.
Are results from laser permanent?
The structural collagen improvements are largely permanent. However, new acne can create new scars, and sun damage can darken existing marks. Ongoing sun protection is essential for maintaining results.