Acne scars can be significantly improved, but the right approach depends entirely on what type of scar you’re dealing with. Flat dark marks left after a breakout are a different problem than pitted or raised scars, and they respond to different treatments. Most people see meaningful improvement through a combination of at-home care and professional procedures, though deeper scars typically require more intensive intervention.
Dark Marks vs. True Scars
The first thing to figure out is whether you have actual scarring or post-inflammatory hyperpigmentation (PIH), which are the flat, discolored spots left behind after a pimple heals. PIH is not a scar. It’s excess pigment deposited in the skin during the healing process, and it fades over time, sometimes on its own. True acne scars involve changes to the skin’s texture: either depressions where tissue was lost or raised areas where the body overproduced scar tissue.
This distinction matters because PIH responds well to topical treatments alone, while textured scars almost always need professional procedures to see real improvement. If you run your finger across your skin and feel smooth, even surfaces with just a color difference, you’re dealing with PIH. If you feel dips, craters, or raised bumps, those are scars.
Fading Dark Marks at Home
For PIH, topical ingredients can make a noticeable difference within a few months. Azelaic acid at 15% to 20% concentration is one of the most effective options, working by slowing the overproduction of pigment. Niacinamide at 4% to 5% is another strong choice, often found in serums paired with hyaluronic acid or vitamin C. Combining niacinamide with azelaic acid can speed results. These are available over the counter or through a prescription, depending on the concentration.
Daily sunscreen is non-negotiable during this process. UV exposure darkens PIH and can undo weeks of progress in a single afternoon.
Types of Textured Acne Scars
Depressed (atrophic) scars are the most common type and come in three forms. Ice pick scars are small, narrow, and deep, pointing down into the skin like a puncture. Boxcar scars are broader with sharp, defined edges, almost like a rectangular dent. Rolling scars have sloping edges and uneven depth, giving the skin a wavy appearance.
Raised scars fall into two categories. Hypertrophic scars are firm, raised bumps that stay within the boundaries of the original breakout. Keloid scars grow beyond those boundaries, expanding larger than the pimple that caused them. Both types are more common on the jawline, chest, back, and shoulders, and people with darker skin tones are more likely to develop them.
Knowing your scar type narrows down which treatments will actually work for you.
Topical Retinoids for Mild Scarring
Retinoids like adapalene and tretinoin stimulate collagen production and speed up skin cell turnover, which can gradually reduce the appearance of shallow scars. A 48-week study using adapalene 0.3% combined with benzoyl peroxide 2.5% found a 21.7% decrease in scar severity at 24 weeks and a 26.9% decrease by 48 weeks. Those are modest numbers, but for mild, shallow scarring, the improvement is visible.
The catch is patience. It takes at least three months to clear active acne, and around six months before collagen remodeling produces a visible effect on scars. Retinoids are best suited as a starting point for shallow scarring or as a complement to professional treatments for deeper scars.
Chemical Peels for Shallow Scars
Superficial chemical peels remove the outermost skin layers and trigger new collagen formation underneath. For acne scarring, glycolic acid at 50% and salicylic acid at 30% are the most commonly used concentrations. A typical course involves four to five sessions spaced three to four weeks apart. These are done in a dermatologist’s office and cause mild redness and peeling for a few days afterward.
Chemical peels work best on shallow boxcar scars and overall skin texture irregularities. They won’t reach deep enough to fix ice pick scars or significantly improve rolling scars on their own.
Microneedling
Professional microneedling uses a device with fine needles to create controlled micro-injuries across the scarred area, triggering the body’s wound-healing response and boosting collagen production. It’s effective for rolling and shallow boxcar scars. A standard treatment plan runs three to six sessions, with each session costing $200 to $700, putting the total investment between $600 and $4,200.
Radiofrequency microneedling adds heat energy to the needle punctures, driving collagen production deeper into the skin. It’s more effective for moderate scarring but costs $600 to $1,200 per session. Recovery from standard microneedling is typically a few days of redness, while the radiofrequency version may involve slightly more downtime.
Laser Resurfacing
Laser treatments are among the most effective options for atrophic acne scars, particularly the deeper varieties. Ablative lasers (CO2 and Er:YAG) vaporize thin layers of scarred skin and stimulate significant collagen remodeling underneath. In comparative studies, over 50% improvement was achieved in 37.5% of patients treated with ablative CO2 lasers, compared to only 12.5% with non-ablative lasers. The tradeoff is more pain during treatment and longer recovery.
Between the two ablative types, CO2 lasers are significantly more effective and actually have shorter overall downtime, though they cause longer-lasting redness. Neither type carries a meaningful difference in pain levels or risk of post-treatment darkening. Most people need two to four laser sessions spaced several weeks apart, and full healing from each session can take one to two weeks of noticeable redness and peeling.
Treating Ice Pick Scars
Ice pick scars are the most stubborn type because they’re narrow and deep. Standard resurfacing treatments often can’t reach the bottom of them. The most targeted approach is a technique where a dermatologist applies a high concentration of trichloroacetic acid (65% to 100%) directly into each individual scar using a toothpick or small applicator. This destroys the scarred tissue at the base and stimulates new collagen to fill the space from the bottom up.
The procedure is repeated monthly until maximum improvement is reached, usually within four to six sessions. Each treatment causes a small scab at the scar site that heals over about a week. It’s one of the few techniques that can meaningfully improve these deep, narrow scars.
Subcision for Rolling Scars
Rolling scars look wavy because fibrous bands of scar tissue underneath the skin pull the surface downward. Subcision addresses this directly: a dermatologist inserts a needle beneath the scar and moves it back and forth to break those tethering fibers. This releases the skin so it can lift back to its normal level, and the controlled injury triggers new collagen at the site.
Subcision is sometimes combined with dermal fillers, which add volume beneath the released scar to prevent the fibers from reattaching. This combination tends to produce better, longer-lasting results for rolling scars than either treatment alone. Bruising is common afterward and can last a week or two.
Managing Raised Scars
Hypertrophic and keloid scars require the opposite approach from depressed scars. Instead of building collagen, the goal is breaking down excess scar tissue. Silicone gel sheets are the most accessible first-line treatment. They work by hydrating and compressing the scar, which softens and flattens it over time. The recommended wear time is 20 to 22 hours per day, and treatment typically continues for at least six months.
That’s a significant commitment. Most studies showing good results had patients wearing silicone sheets daily for four to six months straight. Starting gradually and building up to the full wear time helps with compliance, since the sheets can feel uncomfortable at first. Washing both the sheet and the scar daily is important to prevent irritation. For raised scars that don’t respond to silicone, dermatologists may use corticosteroid injections to shrink the tissue or combine injections with other approaches.
Matching Treatment to Scar Type
- Flat dark marks (PIH): Azelaic acid, niacinamide, retinoids, sunscreen. Improvement in weeks to months.
- Shallow boxcar or rolling scars: Chemical peels, microneedling, retinoids. Three to six sessions over several months.
- Deep boxcar or rolling scars: Laser resurfacing, subcision with fillers, radiofrequency microneedling. Multiple sessions with one to two weeks of recovery each.
- Ice pick scars: Targeted acid application (TCA CROSS). Four to six monthly sessions.
- Raised or keloid scars: Silicone sheets for six or more months, corticosteroid injections.
Most people with moderate to severe scarring get the best results from combining two or more treatments. A dermatologist might start with subcision to release tethered scars, follow with laser resurfacing to smooth the surface, and use targeted acid application on any remaining ice pick scars. Building a treatment plan around your specific scar types, rather than hoping one procedure fixes everything, is what produces the most dramatic improvement.