If acne scars have not responded to topical treatments or superficial facials, the reason is usually depth. FRAX laser for acne scars uses a 1550nm non-ablative fractional erbium beam to create controlled thermal columns through the dermis, triggering collagen remodeling in the scar tissue below the surface without removing the skin layer above.
The laser leaves the epidermis intact between treated zones, which allows the skin to heal faster and with less surface disruption than ablative resurfacing methods. The same collagen remodeling mechanism that reduces atrophic acne scars also improves the appearance of enlarged pores by increasing dermal support around pore openings.
FRAX laser is available at all four Esthetics Center locations in Northern California, performed by licensed providers under the oversight of Dr. Reginald Rice, MD, FACS.
Fractional laser treatment works by targeting only a fraction of the skin at a time. The 1550nm wavelength is absorbed by water in the tissue, converting laser energy into heat. The device delivers this heat in microscopic columns called microscopic treatment zones (MTZs), each of which penetrates the dermis while leaving the surrounding skin between columns untouched.
Within each treated column, the controlled thermal injury triggers the body's wound-healing cascade. Fibroblasts migrate into the zone, deposit new collagen, and remodel the existing scar matrix. Because the surrounding skin remains intact, healing is faster and more efficient than it would be if the entire surface were treated.
This is what separates non-ablative fractional lasers from ablative resurfacing: ablative CO2 or Er:YAG lasers remove the skin surface entirely, requiring a longer healing period but potentially producing more dramatic single-session results. FRAX laser trades some of that single-session intensity for less downtime and broader candidacy across skin tones.
One of the most useful things a provider can tell you before your first session is which of your scar types will respond most to this treatment. Not all atrophic acne scars are the same, and the response to fractional laser treatment differs significantly by scar morphology.
A study published in Dermatology and Therapy examined 31 patients treated with 1550nm erbium-doped fractional laser and measured outcomes by scar type (Lee & Cho, 2023): "Boxcar scars responded better (median ASRE 59.2%) than rolling (ASRE 40.6%, p = 0.017) and icepick scars (ASRE 19.1%, p = 0.010)." Understanding why scar morphology drives this difference helps set appropriate expectations before treatment.
Boxcar scars have broad, defined edges and a flat base. This shape responds well to fractional laser because thermal columns can reach the scar floor and stimulate collagen within the clearly defined boundaries of the depression. In the Lee & Cho 2023 data, boxcar scars showed a median average scar reduction of 59.2%. Patients with predominantly boxcar scarring are generally the best candidates for FRAX laser as a primary treatment.
Rolling scars are often what patients describe when they say their skin looks uneven or textured rather than pitted. They are broad, wave-like depressions with sloped edges and no sharp definition. They often result from fibrous tethering beneath the skin surface that pulls tissue downward.
FRAX laser for acne scars addresses the collagen component within the dermis but does not release subcutaneous fibrous attachments responsible for the rolling appearance in deeper cases.
Patients with significant subcutaneous tethering may benefit from subcision (a procedure that physically releases fibrous bands) before or alongside laser treatment. Median ASRE for rolling scars in the Lee & Cho study was 40.6%.
Ice pick scars are narrow, deep channels extending from the surface into the dermis. Their geometry presents a specific challenge: the 1550nm fractional columns cover a certain treatment area, but the microscopic beam cannot be precisely targeted to the narrow shaft of an ice pick scar.
Thermal energy treats the tissue surrounding the scar more than the scar itself. Median ASRE for ice pick scars was 19.1%, making them the least responsive morphology for fractional laser as a standalone treatment.
For patients with predominantly ice pick scars, treatment is still possible. TCA cross (trichloroacetic acid applied focally into individual scar channels to stimulate focal collagen production) is a more targeted option that is often combined with fractional laser in a staged protocol to address multiple scar types simultaneously.
For atrophic acne scarring of moderate depth, the standard protocol is three to five sessions spaced four to six weeks apart. The spacing allows the collagen remodeling response to complete between sessions rather than overlapping with a new treatment cycle.
The number of sessions depends on scar depth, scar type distribution, treatment density, and individual healing response:
One of the reasons patients choose FRAX over ablative resurfacing is the recovery window. FRAX laser recovery is shorter than ablative resurfacing because the epidermis is not removed.
The typical sequence:
During recovery, avoid retinoids, exfoliating acids, and physical scrubs until the skin returns to normal texture. Apply SPF 30 or higher every morning without exception. Post-inflammatory hyperpigmentation (PIH) is a risk following any laser treatment during the recovery period: sun exposure on healing skin can trigger melanin overproduction in the treated zones, which is particularly important to manage in Fitzpatrick III and above skin types.
FRAX and ablative CO2 laser represent different points on the resurfacing spectrum.
For patients with moderate atrophic acne scarring who cannot take extended downtime, or who have Fitzpatrick III or IV skin tones, FRAX laser's non-ablative approach provides a clinically meaningful treatment course with a manageable recovery window. For patients with severe scarring, lighter skin tones, and the ability to tolerate longer downtime, ablative resurfacing may produce more significant results per session.
Your provider at Esthetics Center will assess your scar type, depth, skin tone, and scheduling constraints to determine the most appropriate approach.
Most patients who come in asking about acne scar treatment are good candidates for the FRAX laser. It is generally well-suited to adults with:
Patients who should discuss candidacy carefully before proceeding include:
Patients with Fitzpatrick type V or VI skin tones who carry elevated PIH risk from any resurfacing treatment and require individualized pre- and post-treatment protocols
FRAX laser treatments for acne scars are available at all four Esthetics Center locations across Northern California. Consultations include a skin assessment, scar type evaluation, and a treatment protocol designed around your skin's needs.
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Book a consultation or get in contact to discuss whether the FRAX laser is appropriate for your acne scar type.
FRAX laser treats atrophic acne scars: depressions caused by collagen loss following inflammatory acne. Boxcar scars respond best (approximately 59% average scar reduction in published clinical data), followed by rolling scars (approximately 41%).
Ice pick scars show a limited response (approximately 19%) and may require combination treatment alongside TCA cross. These percentages are median values from a single 31-patient study; individual outcomes vary based on scar depth, skin type, and treatment protocol.
Most patients with moderate atrophic scarring require three to five sessions spaced four to six weeks apart. Exact session count depends on scar depth, scar type, and individual response. Results continue to improve for three to six months after the final session as collagen remodeling completes.
Most patients find it very manageable. A topical numbing cream is applied before treatment to reduce discomfort. During the session, most patients describe a sensation similar to snapping rubber bands against the skin with warmth in the treated area. Sessions take approximately 20 to 45 minutes, depending on the area treated.
FRAX (Ellipse) and Fraxel (Solta Medical) are different branded devices using the same underlying 1550nm non-ablative fractional laser technology. Both create microscopic treatment zones in the dermis to trigger collagen remodeling. The specific device settings, pulse profiles, and applicator designs differ between brands. Mechanism, recovery, and candidacy considerations are comparable.
Non-ablative fractional lasers are generally safer for darker skin tones than ablative alternatives, but post-inflammatory hyperpigmentation (PIH) remains a risk in Fitzpatrick IV and higher skin types. Patients with darker skin tones should discuss their specific risk profile, pre-treatment protocols (topical depigmenting agents), and appropriate energy settings with their provider before proceeding.
Improvements from fractional laser remodeling are generally long-lasting, since newly deposited collagen in the treated scar tissue is not expected to spontaneously revert. Individual results can vary based on scar depth, skin type, and skincare maintenance.
New acne breakouts in the same area can create additional scarring over time, which is why maintaining clear skin after treatment is important for preserving the result.
