Acne scars respond to a wide range of treatments, from drugstore creams to in-office laser procedures, but no single option erases every type of scar. The best approach depends on the kind of scar you have, your skin tone, and how much downtime and cost you can handle. What most people call “acne scars” actually falls into two broad categories: true textural scars (pits, indentations, or raised tissue) and flat discoloration left behind after a breakout. Each responds to different treatments, and misidentifying what you’re dealing with is one of the most common reasons people waste time and money on the wrong products.
Know What You’re Actually Treating
Before spending anything on scar treatment, figure out whether you have textural scars, discoloration, or both. Textural scars are physical changes in the skin’s structure: ice pick scars (narrow, deep pits), boxcar scars (wider depressions with sharp edges), and rolling scars (broad, shallow undulations caused by bands of scar tissue pulling the skin down). These happen when inflammation damages collagen during the healing process. On the raised side, hypertrophic scars and keloids form when the body overproduces collagen during repair.
Discoloration, by contrast, is flat. Post-inflammatory hyperpigmentation (PIH) leaves dark spots where excess melanin accumulates after inflammation. It’s especially common in darker skin tones, where melanin production responds more aggressively to injury and UV exposure.1Dovepress / Clin Cosmet Investig Dermatol. Post-Inflammatory Hyperpigmentation in Dark Skin: Molecular Mechanism and Skincare Implications Post-inflammatory erythema (PIE) leaves pink or red marks, more visible on lighter skin. PIH and PIE are not scars in the structural sense, and they often fade on their own over months. True textural scars generally do not.
This distinction matters because a product that fades dark marks (like azelaic acid) won’t fill in an ice pick scar, and a procedure that rebuilds collagen in depressed scars (like a fractional laser) may be overkill for flat discoloration. Many people have a mix of both, which is why combination strategies tend to outperform any single treatment.
Topical Treatments You Can Start at Home
Topicals are the most accessible entry point. They won’t dramatically reshape deep scars, but they can visibly improve mild textural irregularities and are the first-line treatment for post-inflammatory discoloration.
Retinoids. Adapalene (available over the counter at 0.1% in many countries, and by prescription at 0.3%) accelerates cell turnover and stimulates collagen remodeling. In a six-month randomized trial, a combination of adapalene 0.3% with benzoyl peroxide 2.5% reduced total scar counts by about 15% on the treated side, while the untreated side saw scars increase by roughly 14%, a net difference of around 30%.2PubMed Central. Prevention and Reduction of Atrophic Acne Scars with Adapalene 0.3%/Benzoyl Peroxide 2.5% Gel in Subjects with Moderate or Severe Facial Acne Much of that benefit came from preventing new scars by controlling active acne, which is itself a form of scar treatment. Prescription-strength tretinoin works through a similar mechanism and is widely used for the same purpose.
Azelaic acid. At 15–20% concentrations, azelaic acid targets both mild texture issues and PIH. A clinical trial found that 15% azelaic acid gel significantly reduced melanin content in PIH spots by week 12, with minimal side effects.3PubMed Central. Effects of 15% Azelaic Acid Gel in the Management of Post-Inflammatory Erythema and Post-Inflammatory Hyperpigmentation in Acne Vulgaris It also improved post-inflammatory erythema in the same study, making it a practical two-for-one option if you have both red marks and dark spots. A comparative trial found its effectiveness against PIH was similar to topical tranexamic acid, though azelaic acid caused more side effects in the first few weeks of use.4PubMed Central. A comparative study of 20% azelaic acid cream versus 5% tranexamic acid solution for the treatment of postinflammatory hyperpigmentation in patients with acne vulgaris
Tranexamic acid. Originally used to control bleeding, tranexamic acid has gained traction in dermatology for fading hyperpigmentation. A literature review found that oral, topical, and intradermal forms all significantly reduce pigmentation in melasma and PIH.5PubMed Central. Tranexamic Acid for Hyperpigmentation Disorders: A Literature Review on Efficacy and Safety in Melasma and PIH Topical serums (typically 2–5%) are widely available and generally well tolerated. It won’t rebuild collagen in depressed scars, but for lingering dark spots, it’s a solid option to layer with a retinoid.
Glycolic acid. Low-strength glycolic acid used daily at home can produce modest improvements in atrophic scars over time, though a comparative study found that professional-strength 70% glycolic acid peels performed biweekly gave significantly better results than daily home use of a low-concentration product.6PubMed. Biweekly serial glycolic acid peels vs. long-term daily use of topical low-strength glycolic acid in the treatment of atrophic acne scars If you’re using glycolic acid at home, set realistic expectations: you’re nudging the surface, not rebuilding architecture. Still, long-term daily use was better tolerated and the study authors noted it may help patients who can’t handle the irritation of peels.
At-Home Devices
Consumer-grade devices have flooded the market, but the evidence behind them is thinner than the marketing suggests.
Derma rollers and at-home microneedling pens. Professional microneedling uses needles typically 1.0–2.5 mm deep to create controlled micro-injuries that trigger collagen production. At-home rollers use much shorter needles (usually 0.25–0.5 mm) and simply can’t reach the depth where meaningful collagen remodeling happens for atrophic scars. They may help topical products penetrate better and contribute to mild surface-level improvement, but expecting a home roller to fill in ice pick scars is unrealistic. A systematic review of microneedling safety found that the most common adverse effects were short-lived redness, swelling, and pain, but more persistent problems like post-inflammatory hyperpigmentation and even tram-track scarring were reported, particularly in people with darker skin or active infections.7Dermatologic Surgery. Safety Profile for Microneedling: A Systematic Review In other words, even the supposedly low-risk version carries risks if used carelessly.
LED light therapy. Red and near-infrared LED panels are marketed for skin rejuvenation and scar reduction. Low-level light therapy does have evidence behind it: red and near-infrared photons are absorbed by skin cells and stimulate healing cascades that can benefit acne scars and hypertrophic scars.8PubMed Central. Low-level laser (light) therapy (LLLT) in skin: stimulating, healing, restoring Consumer LED devices do appear to have beneficial effects across several skin conditions, including wound healing and skin rejuvenation.9PubMed Central. Light-emitting Diodes: A Brief Review and Clinical Experience The catch is that the power output of home devices is much lower than clinical-grade units, and most studies showing results on acne scars specifically used professional equipment. LED therapy is unlikely to hurt and may offer incremental improvement, but it’s best viewed as a supplement to other treatments rather than a standalone solution for visible scarring.
Professional Chemical and Physical Treatments
Once you move beyond what topicals can do, in-office procedures offer a meaningful step up in results, particularly for textural scars.
TCA CROSS for ice pick scars. The CROSS technique (chemical reconstruction of skin scars) uses high-concentration trichloroacetic acid applied precisely to individual ice pick scars to trigger inflammation and new collagen formation. A study using 100% TCA found that more than 70% improvement was achieved in eight out of ten patients.10PubMed Central. An Assessment of the Efficacy and Safety of CROSS Technique with 100% TCA in the Management of Ice Pick Acne Scars Research in darker skin types confirmed similar results: about 73% of patients achieved excellent improvement after four sessions, with the technique proving safe and cost-effective.11PubMed. Evaluation of CROSS technique with 100% TCA in the management of ice pick acne scars in darker skin types Both 80% and 100% TCA concentrations have been studied and shown to be effective for ice pick scars.12Dermatologic Surgery. Comparing the Use of 80% Trichloroacetic Acid and 50% Trichloroacetic Acid for the Treatment of Ice Pick Acne Scars This is one of the few treatments with strong evidence specifically for the narrow, deep scars that lasers alone often struggle to fully address.
Subcision for rolling scars. Rolling scars are caused by fibrous bands of scar tissue anchoring the skin surface to deeper tissue, creating that wave-like appearance. Subcision involves inserting a needle or cannula under the skin to physically sever those bands. Once detached, the skin lifts, and the controlled injury stimulates wound healing and new connective tissue growth to fill the treated area.13Dove Press (Clinical, Cosmetic and Investigational Dermatology). Subcision for Atrophic Acne Scarring: A Comprehensive Review of Surgical Instruments and Combinatorial Treatments It works especially well for scars that visibly improve when you stretch the skin taut, because those scars are being actively pulled down by tethering. Subcision is often combined with other treatments, as discussed below.
Professional microneedling. At clinical needle depths, microneedling produces enough controlled trauma to generate real collagen remodeling. A randomized trial combining microneedling with 35% glycolic acid peel found that the combination was more effective than the peel alone, with about 97% of patients in the combination group seeing improvement versus about 73% with peel alone.14Journal of Pakistan Association of Dermatologists. Comparison of Efficacy and safety of Microneedling with 35% Glycolic acid peel versus Glycolic acid peel alone in the treatment of Atrophic acne scars Radiofrequency microneedling takes this further by delivering heat energy through the needles, stimulating additional collagen production and reducing acne lesions at the same time.15PubMed. Comparison of fractional microneedling radiofrequency and bipolar radiofrequency on acne and acne scar and investigation of mechanism
Laser Treatments
Lasers are among the most studied treatments for acne scarring, and they break into two main camps: ablative fractional lasers, which vaporize tiny columns of skin to force deep remodeling, and non-ablative fractional lasers, which heat tissue without removing it. Both work by creating controlled zones of damage that the body repairs with new collagen.
A comparative study of fractional CO₂ (ablative) and 1,550 nm non-ablative lasers in patients with darker skin found that roughly a third of patients in both groups achieved more than 50% improvement. Patient satisfaction was about 71% for the non-ablative group and 65% for the ablative group. The non-ablative laser had less downtime, while post-inflammatory hyperpigmentation occurred in about 14–17% of patients in both groups.16PubMed. Acne scars in ethnic skin treated with both non-ablative fractional 1,550 nm and ablative fractional CO2 lasers A more recent split-face trial confirmed that multiple sessions of non-ablative fractional laser could approach the results of a single ablative session, with less pain and fewer side effects.17PubMed. Comparison of multiple 1565 nm fractional Er: glass laser and single fractional CO(2) laser in the treatment of atrophic acne scars
The practical trade-off: ablative lasers tend to deliver faster, more dramatic results per session but come with several days of raw, weepy skin, redness that can last weeks, and a higher risk of pigmentation changes. Non-ablative lasers require more sessions but let you return to daily life much sooner. For people with limited downtime, the non-ablative route is often the more realistic choice. A meta-analysis found that fractional CO₂ laser was cost-comparable to other laser options and less expensive than some alternatives, though the non-fractional ablative CO₂ laser had similar or lower pricing with comparable outcomes.18PubMed. The clinical effectiveness and cost-effectiveness of fractional CO(2) laser in acne scars and skin rejuvenation
Fillers for Depressed Scars
When a scar is primarily a volume problem — a dip or depression where tissue was lost — hyaluronic acid (HA) fillers can provide immediate improvement by physically lifting the depressed area. HA fillers are well suited for atrophic scarring because they’re reversible, allow precise placement, and come in different formulations for different depths and scar widths.19PubMed Central. Treatment of a traumatic atrophic depressed scar with hyaluronic acid fillers: a case report
Beyond the instant filling effect, some HA formulations appear to stimulate the skin’s own collagen production over time. A comparative study of two HA-based fillers found that one delivered an earlier structural lift, while the other produced a delayed but more pronounced biostimulatory improvement in later visits.20PubMed. Comparison of 2 Hyaluronic Acid-based Fillers for the Treatment of Acne Scars: Structural Lifting Versus Biostimulatory Effect Fillers are typically used for broader, shallower scars rather than narrow ice picks, and the results are temporary — most HA fillers are gradually absorbed over months, so repeat sessions are needed to maintain the effect.
Why Combination Treatments Often Work Best
Most people with moderate-to-severe acne scarring have a mix of scar types: some ice picks, some rolling scars, maybe some boxcar depressions and flat discoloration on top of it all. No single procedure addresses all of these equally well, which is why dermatologists increasingly favor multimodal approaches that attack the problem from several angles.
A case series combining TCA CROSS, subcision, and microneedling reported consistently high patient satisfaction and photographic evidence of improvements across all skin types. The rationale was straightforward: CROSS stimulates collagen growth within individual scars, subcision releases the tethering that pulls rolling scars down, and microneedling promotes overall resurfacing.21PubMed Central. A Combination Approach to Treating Acne Scars in All Skin Types These components target different aspects of the problem, which is why stacking them produces better results than repeating any single treatment.
For raised scars, the treatment toolkit looks different. Silicone sheeting, vascular lasers, and intralesional injections (corticosteroids or cytotoxic agents) remain the mainstays for hypertrophic scars and keloids.22PubMed. Management of post-acne scarring. What are the options for treatment? The point is worth emphasizing: raised and depressed scars are essentially opposite problems, and treating one type with the other’s tools can make things worse.
Skin Tone and Safety Considerations
If you have a darker skin tone, every energy-based or invasive procedure carries an elevated risk of triggering new post-inflammatory hyperpigmentation, which is a frustrating irony when you’re treating discoloration or scars in the first place. The risk isn’t a reason to avoid treatment; it’s a reason to choose carefully and work with a provider experienced in treating skin of color.
Non-ablative fractional lasers at 1,550 nm have been specifically studied in Fitzpatrick skin types IV through VI and found to be safe and effective, though self-limited hyperpigmentation was common, especially at higher treatment densities.23Dermatologic Surgery. Nonablative Fractional Laser Resurfacing for Acne Scarring in Patients With Fitzpatrick Skin Phototypes IV-VI Newer 1,550 nm devices with advanced cooling technology aim to reduce this risk further by limiting heat buildup in superficial layers where melanocytes sit.24PubMed Central. Treating Acne Scars in Fitzpatrick Skin Types I–VI Using a Novel 1550 nm Non‐Ablative Resurfacing Laser With Focal Point Technology Picosecond lasers with diffractive lens arrays have also shown a favorable safety profile for scar treatment in skin types IV through VI.25PubMed. Safety of a picosecond laser with diffractive lens array (DLA) in the treatment of Fitzpatrick skin types IV to VI
For darker-skinned patients, lower energy settings, longer intervals between sessions, and pre-treatment with a melanin-suppressing topical (like a retinoid or azelaic acid) are standard strategies to minimize pigmentary complications. Chemical peels and microneedling can also be good options in darker skin, but again, provider experience matters enormously. TCA CROSS has been shown to be safe and effective in darker skin types specifically.11PubMed. Evaluation of CROSS technique with 100% TCA in the management of ice pick acne scars in darker skin types
Timing Treatments Around Isotretinoin and Active Acne
A long-standing piece of dermatology lore holds that you should wait six months to a year after finishing isotretinoin (Accutane) before undergoing any procedures. The evidence has shifted on this. A task force review concluded that many procedures, including fractional lasers, fractional radiofrequency microneedling, superficial and medium-depth peels, and microdermabrasion, are safe in patients currently taking or recently finished with isotretinoin.26PubMed Central. Standard Guidelines of Care: Performing Procedures in Patients on or Recently Administered with Isotretinoin A study specifically examining combined fractional microneedle radiofrequency and CO₂ laser in patients on low-dose isotretinoin found no persistent side effects and further scar improvement in those patients.27Dermatologic Surgery. Safety of Combined Fractional Microneedle Radiofrequency and CO2 as an Early Intervention for Inflammatory Acne and Scarring Treated With Concomitant Isotretinoin
Beyond the isotretinoin question, the broader principle is to get acne under control before aggressively treating scars. Active breakouts create new inflammation, which can create new scars while you’re trying to fix old ones. Early and effective treatment of acne itself reduces the risk of scarring in the first place.28PubMed Central. Dermatology: how to manage acne vulgaris If your acne is still flaring, prioritize getting it controlled with a dermatologist before investing in scar-specific procedures.
Emerging Therapies
Regenerative medicine is moving into scar treatment. Platelet-rich plasma (PRP), stem cell-derived exosomes, and conditioned media from stem cells are all being studied as ways to accelerate the skin’s own repair processes. A systematic review found that adipose tissue stem cell exosome treatment decreased scar severity scores by about a third, and that combining fractional CO₂ laser with PRP produced greater improvements in acne scars than laser combined with stem cell-conditioned medium.29PubMed. Regenerative Medicine for Atrophic Scars: A Systematic Review of Extracellular Vesicles, Conditioned Media, Stromal Vascular Fraction, and Mesenchymal Stem Cells A narrative review found potential applications for PRP in wound healing, facial rejuvenation, and acne scars, while exosomes showed promise for skin rejuvenation and scar reduction.30Dermatological Reviews. Applications of Plasma‐Rich Plasma, Exosomes, and Stem Cells in Aesthetics: A Narrative Review
These therapies are not yet standard care for acne scars. Most of the evidence comes from small studies, and standardization of preparation methods (especially for PRP, where the platelet concentration can vary widely between providers) remains an issue. They’re most likely to enter clinical practice as add-ons to established procedures like fractional lasers or microneedling rather than as standalone treatments.
The Psychological Weight of Scarring
Acne scars aren’t just a cosmetic concern. In a cross-sectional study, people with acne scarring had quality-of-life impairment scores nearly double those of people with acne alone, and 96% reported that their scarring interfered with their social life, relationships, or daily activities to some degree. About 72% of those with acne scars said they were “usually concerned” or “very depressed and miserable” about their skin.31Journal of Clinical and Aesthetic Dermatology. The Impact of Acne Scarring on Quality of Life, Willingness-to-pay, and Time Trade-off
A multi-country population-based survey found that about 17% of participants with acne scars had clinical features of dysmorphia, and the most commonly reported forms of distress were self-consciousness and worry about scars not going away.32PubMed Central. Impact of Facial Atrophic Acne Scars on Quality of Life: A Multi-country Population-Based Survey One finding that stands out: even people with objectively mild scarring sometimes reported very high impairment scores, meaning the subjective distress didn’t always match the clinical severity.33PubMed Central. Beyond the Surface: A Deeper Look at the Psychosocial Impacts of Acne Scarring If you’re bothered by your scars, that feeling is valid regardless of how someone else might classify their severity. Seeking treatment for scars that affect your daily life or self-image is a legitimate medical concern, not vanity.