The best treatment for acne scars depends on the type of scar you have. Flat dark or red marks left behind after a breakout are not true scars and typically fade with topical products over 3 to 6 months. Indented or raised scars, on the other hand, involve structural changes in the skin that usually require professional procedures to see real improvement. Most people have a mix of scar types, which is why dermatologists often recommend combining treatments rather than relying on a single approach.
Know Your Scar Type First
Acne scars fall into two broad categories: those that sit below the skin’s surface (atrophic) and those that rise above it (hypertrophic or keloid). The distinction matters because a treatment that works beautifully on one type can be ineffective or even harmful on another.
Atrophic scars come in three shapes. Ice pick scars are small, narrow holes that point deep into the skin, most common on the cheeks. Boxcar scars are wider depressions with sharp, defined edges, usually found along the lower cheeks and jaw. Rolling scars have sloping edges and varying depths that give the skin a wavy, uneven texture. Of the three, rolling scars tend to respond best to collagen-stimulating treatments, while ice pick scars are the most stubborn.
Hypertrophic and keloid scars are raised lumps of excess scar tissue. Hypertrophic scars stay within the boundaries of the original breakout, while keloids grow beyond them. Both are more common on the jawline, chest, back, and shoulders. These typically require steroid injections or silicone sheeting rather than the resurfacing treatments used for indented scars.
Topical Treatments for Dark Marks
If your main concern is discoloration rather than texture, topical products can make a significant difference. Post-inflammatory hyperpigmentation, the flat red or brown marks that linger after acne heals, responds well to several ingredients you can use at home.
Retinoids are the cornerstone. A study of adapalene 0.3% gel found that over 80% of users reported improved skin texture and scar appearance after 24 weeks of daily use, with over half showing measurable improvement on clinical grading scales. Adapalene 0.1% is available over the counter (sold as Differin), while the stronger 0.3% concentration requires a prescription. Tretinoin, another prescription retinoid, has also been studied for hyperpigmentation: nightly application of 0.1% cream for 24 weeks produced meaningful fading in clinical trials.
For faster results on dark spots, a combination approach works better than any single ingredient. One well-studied protocol pairs azelaic acid 15% gel with tretinoin 0.05%, which delivered a 60% reduction in acne lesions and significant improvement in discoloration over 12 weeks. Another classic combination, sometimes called a “triple cream,” blends hydroquinone 4%, tretinoin 0.05%, and a mild steroid, applied nightly for 12 weeks. Hydroquinone is the most potent skin-lightening agent available but should be used in cycles rather than continuously to avoid rebound darkening.
Microneedling and Radiofrequency
Microneedling creates tiny, controlled punctures in the skin that trigger your body’s wound-healing response, producing new collagen to fill in depressed scars. When combined with radiofrequency energy, the treatment delivers heat at specific depths to amplify that collagen response. Needles typically penetrate 2 to 3.5 mm, depending on the treatment area and scar depth.
Most protocols call for 2 to 6 sessions spaced about a month apart. You can expect redness and mild swelling for a day or two after each session. Visible smoothing starts within a few weeks, but the full effect builds over months as new collagen matures beneath the surface. Radiofrequency microneedling runs $500 to $1,500 per session, making it one of the more accessible professional options.
Laser Resurfacing
Lasers remain the gold standard for moderate to severe atrophic scars, and the two main categories work quite differently.
Ablative Lasers
CO2 lasers are the most aggressive option. They vaporize the outer layers of skin, forcing it to rebuild from scratch. New pink skin becomes visible after 7 to 10 days, with substantial improvement apparent at one month. Deep collagen remodeling continues for 6 to 12 months afterward. The tradeoff is real downtime: expect a week or more of raw, healing skin, and several weeks of redness. CO2 lasers also carry a higher risk of pigment changes in darker skin tones.
Fractional and Non-Ablative Lasers
Fractional lasers like Fraxel treat only a fraction of the skin at a time, leaving healthy tissue between treatment zones to speed healing. Initial smoothing is visible at 2 to 3 weeks, with meaningful scar reduction after 2 to 3 sessions and optimal results at 6 months after the final treatment. Fraxel sessions typically cost $800 to $1,500 each.
Non-ablative lasers skip the surface entirely and heat deeper tissue to stimulate collagen without an open wound. Results are more gradual, with noticeable changes after 3 to 4 sessions and final results arriving 6 to 12 months after completing the full series. These are gentler, with minimal downtime, but require more sessions to reach the same endpoint.
Hybrid lasers like the Halo combine ablative and non-ablative wavelengths in a single pass, offering a middle ground between aggressive resurfacing and gentler options. They run $1,200 to $2,500 per session.
Safety for Darker Skin Tones
If you have medium to deep skin (Fitzpatrick types IV through VI), the biggest risk with any resurfacing treatment is post-inflammatory hyperpigmentation, meaning the treatment itself can leave dark marks. Ablative CO2 lasers carry the highest risk. A recent multicenter trial of a newer-generation 1550-nm non-ablative laser found no significant differences in effectiveness or side effects between lighter and darker skin types, with a notably low rate of pigment changes compared to older non-ablative devices. Microneedling, both with and without radiofrequency, is also considered safer across skin tones because it doesn’t target melanin the way some lasers do.
Chemical peels at superficial to medium depths are generally safe for darker skin when performed by an experienced provider, but deep peels are typically avoided. If you have darker skin and are considering laser treatment, look for a provider with specific experience treating your skin type.
The TCA CROSS Technique for Ice Pick Scars
Ice pick scars are notoriously resistant to standard resurfacing because they extend so deeply into the skin. The CROSS technique (Chemical Reconstruction of Skin Scars) targets them individually. A provider applies a high concentration of trichloroacetic acid, typically 70%, directly into each scar using a small applicator, causing the walls of the scar to collapse inward and stimulate new collagen from the bottom up.
This is not a one-and-done treatment. In a study of 20 patients with ice pick scars, 70% achieved an excellent response after 6 sessions, and an additional 25% achieved a good response at that point. Even after 3 sessions, only about 20% had reached the excellent category. Sessions are spaced several weeks apart. For deep rolling and boxcar scars, repeated applications can normalize the skin surface over time.
Dermal Fillers
Injectable fillers work by physically lifting the base of depressed scars to bring them level with surrounding skin. They’re best suited for rolling and boxcar scars with soft, pliable edges.
How long results last depends entirely on the filler material. Collagen-based fillers provide about 6 months of improvement. Calcium hydroxylapatite, polycaprolactone, and fat transfers last 6 months or longer. Poly-L-lactic acid, which stimulates your own collagen production rather than just filling space, can maintain results for up to 2 years, with some studies showing benefits lasting as long as 4 years. Polymethylmethacrylate is the only filler with specific FDA approval for acne scars and is considered semi-permanent.
Combining Treatments for Better Results
Because most people have multiple scar types, dermatologists frequently layer treatments in phases. A common approach starts with chemical peels to improve overall texture and prepare the skin. The second phase introduces fractional laser or microneedling to stimulate deeper collagen remodeling. Maintenance treatments and targeted skincare follow to sustain results.
For example, someone with a mix of rolling scars and ice pick scars might receive microneedling across the full face for general texture improvement, TCA CROSS for individual ice pick scars, and a filler for a few deep boxcar scars. This combination approach almost always produces better outcomes than any single treatment repeated in isolation.
Realistic Timelines and Costs
Acne scar treatment is slow. Initial texture smoothing from most procedures appears within 2 to 4 weeks, but meaningful scar reduction takes 2 to 3 months, and optimal results from collagen remodeling arrive 6 to 12 months after your final session. Topical retinoids need at least 24 weeks of consistent use to show their full effect.
Costs add up quickly since most treatments require multiple sessions. Chemical peels are the most affordable at $150 to $700 per session. Radiofrequency microneedling falls in the $500 to $1,500 range. Fraxel and other fractional lasers run $800 to $1,500, and hybrid lasers can reach $2,500 per session. Insurance rarely covers acne scar treatment since it’s considered cosmetic. Many clinics offer payment plans, and starting with the most impactful treatment for your specific scar type helps avoid spending money on procedures that won’t move the needle for you.