Laser Treatment for Acne Scars: Types, Costs, and Recovery Time

What Laser Treatment Actually Does to Skin

Lasers work by delivering concentrated light energy to a precise depth in the skin. Depending on the wavelength and delivery method, that energy either removes the outer layers of skin entirely or heats deeper layers to stimulate a wound-healing response.

For acne scars, the goal is collagen remodeling. Acne leaves behind either tissue loss (atrophic scars) or excess collagen buildup (hypertrophic scars). Lasers address atrophic scars by triggering the body to produce new collagen to fill and smooth those depressions. For raised scars, certain lasers target the overactive collagen and blood vessels that keep tissue elevated and red.

The outcome is gradual. Collagen takes weeks to months to remodel after each session, which is why results continue improving for up to six months after treatment ends.

Types of Lasers Used for Acne Scars

Ablative Lasers (CO2 and Erbium)

Ablative lasers vaporize the outer layers of skin. They are the most aggressive option and produce the most dramatic results, but they also require the longest recovery.

CO2 lasers deliver energy that removes the epidermis and heats the upper dermis simultaneously. They are highly effective for moderate to severe atrophic scarring, particularly boxcar and rolling scars. Recovery typically takes one to two weeks, during which the skin is raw, weeping, and sensitive.

Erbium (Er:YAG) lasers work similarly but with less heat transfer to surrounding tissue, which translates to slightly less downtime (five to seven days) and a somewhat lower risk of post-treatment redness that lingers for weeks. Results are comparable to CO2 for shallow to moderate scars but somewhat less effective on deeper ones.

Both ablative types carry a meaningful risk of post-inflammatory hyperpigmentation in medium to dark skin tones and require strict sun avoidance before and after treatment.

Non-Ablative Lasers

Non-ablative lasers leave the skin surface intact and heat the dermis below to stimulate collagen production. The tradeoff is less downtime (usually one to three days of mild redness and swelling) but more sessions needed and more modest per-session improvement.

The pulsed dye laser (PDL) targets blood vessels and is particularly useful for red or pink hypertrophic scars and post-inflammatory erythema. It does little for atrophic scars but can significantly reduce the redness and elevation of raised tissue.

Nd:YAG lasers penetrate deeper into the skin and are often used for collagen stimulation in darker skin tones where surface ablation carries higher risk. Results require patience and consistency across multiple sessions.

Fractional Lasers

Fractional technology is now the most commonly used approach for acne scars because it balances efficacy with safety.

Fractional lasers deliver energy in thousands of microscopic columns called microthermal treatment zones, leaving the tissue between those columns untouched. The intact surrounding skin accelerates healing and lowers the risk of complications compared to treating the entire surface at once.

Fractional ablative lasers (fractional CO2 or fractional Er:YAG) still remove skin within each micro-column but spare the tissue between them, cutting downtime to five to seven days while delivering results closer to fully ablative treatments.

Fractional non-ablative lasers (such as Fraxel Restore) treat within the dermis without removing surface skin. Downtime is typically two to four days. Multiple sessions are necessary, but the risk profile is more favorable for a wider range of skin tones.

Which Laser Works Best for Each Scar Type

Ice pick scars are narrow, deep channels that extend into the dermis. Surface lasers, even ablative ones, do not reach deep enough to fully address them. These scars typically respond better to a technique called punch excision or CROSS (chemical reconstruction of skin scars using TCA), with laser as a supplementary treatment afterward for smoothing.

Boxcar scars, which are wider depressions with defined edges, respond well to fractional ablative treatments. The sharper edges that define them can be softened and the scar base elevated as collagen fills in over time.

Rolling scars involve fibrous bands tethering the skin downward, creating an undulating texture. Subcision to release those bands is often performed first, followed by laser resurfacing to smooth the surface. Laser alone is less effective on rolling scars that are still actively tethered.

Hypertrophic scars benefit most from pulsed dye laser, which reduces redness and flattens raised tissue over three to five sessions. Keloids are generally not treated with laser alone and may worsen with certain approaches. A dermatologist evaluation is essential before laser treatment on keloid-prone skin.

What to Expect Before, During, and After Treatment

Preparation

Stop using retinoids, AHAs, and BHAs at least five to seven days before treatment. Avoid sun exposure for four to six weeks prior. If you have a history of cold sores, an antiviral prescription is typically started beforehand to prevent an outbreak. Darker skin tones are often pretreated with a topical brightening agent for four to six weeks before ablative laser to reduce hyperpigmentation risk.

During and After the Procedure

A topical numbing cream is applied before treatment. Ablative sessions on larger areas may use nerve blocks or oral sedation. Most patients describe a warm, prickling sensation. Sessions run thirty to sixty minutes.

Recovery varies by laser type. Fully ablative treatments leave skin raw and weeping for three to five days, with full healing over ten to fourteen days and residual redness persisting for weeks. Fractional ablative treatments involve redness and swelling for two to four days, with most people returning to work within five to seven days. Non-ablative approaches cause one to three days of mild redness with minimal disruption to daily activities.

Post-treatment: SPF 30 or higher every day for at least three months is non-negotiable. Use gentle cleansers and fragrance-free moisturizers. Avoid retinoids, acids, and active ingredients until skin is fully healed. Do not pick peeling skin.

How Much Does Laser Treatment Cost

Laser treatment for acne scars is cosmetic and not covered by insurance in most cases.

Non-ablative fractional sessions range from $200 to $1,000 per session, with three to six sessions commonly needed, placing total costs between $600 and $6,000. Ablative fractional treatments run $1,000 to $3,000 per session but may require fewer sessions. Fully ablative CO2 resurfacing of the full face can reach $2,000 to $5,000 or more per session.

Prices vary by provider credentials, geographic market, and whether sedation is involved. Board-certified dermatologists and plastic surgeons typically charge more than medical spas but bring greater expertise in managing complications.

Realistic Results and Limitations

Most people see a 50 to 75 percent improvement in the appearance of treated scars: smoother texture, softer edges, and less visible depth. Scars are reduced, not erased. Before-and-after photographs typically show clear improvement, but scars remain visible under close inspection or certain lighting.

Results depend on scar type, depth, skin tone, laser selection, and provider skill. Combining laser with other procedures (subcision for rolling scars, fillers for deep boxcar scars) often produces better outcomes than laser alone.

The acne scar treatments most likely to succeed are matched specifically to the scar types and risk profile of the individual patient, which is why a thorough consultation matters before committing. Understanding laser skin procedures more broadly helps patients ask better questions and set accurate expectations.

Risks and Who Should Be Cautious

The most common complication is post-inflammatory hyperpigmentation. Fitzpatrick skin types IV through VI face a higher baseline risk with ablative lasers, but darker skin tones can be treated safely with appropriate laser selection and an experienced provider.

Other risks include burns from incorrect settings, infection from poor wound care, prolonged redness lasting weeks to months after ablative treatment, and rarely, additional scarring. Active acne at the time of treatment can also interfere with healing.

People finishing isotretinoin are typically advised to wait six months before laser resurfacing, as the medication affects skin regeneration and wound healing.

Featured Image

Dermatologist adjusting a laser device near a patient's face during a skin resurfacing consultation.

The Bottom Line

Laser treatment is one of the most effective options for atrophic acne scars like boxcar and rolling scars. The key is matching the right laser to the right scar on the right skin tone, and going in with accurate expectations: improvement, not erasure.

Before committing, understanding your scar types and risk factors matters, since the right approach depends on whether your scars are atrophic, hypertrophic, or a mix of both.

Doctronic.ai connects you with licensed clinicians who can evaluate your skin and identify whether laser is the right next step before you invest in a procedure that may not fit your needs.