Acne scars can be significantly improved, but the right approach depends on what type of scar you’re dealing with. Shallow, wavy scars respond well to different treatments than deep, narrow ones. Most people see meaningful results from a combination of methods rather than any single fix, and setting realistic expectations matters: even the best procedures typically improve scar appearance by 30% to 70%, not 100%.
Identify Your Scar Type First
Not all acne scars are the same, and treatments that work well for one type can be ineffective for another. Scars generally fall into two categories: indented (atrophic) and raised (hypertrophic). Within the indented category, there are three distinct shapes.
Ice pick scars are small, narrow indentations that point deep into the skin like a tiny puncture. They’re among the hardest to treat because of their depth relative to their width. Boxcar scars are broader depressions with sharp, defined edges, almost like a small crater. Rolling scars have sloping edges and varying depth, giving the skin an uneven, wavy texture. These are often the most responsive to treatment because fibrous bands pulling the skin downward can be released.
Hypertrophic and keloid scars are the opposite problem: raised lumps of scar tissue where the skin overproduced collagen during healing. Hypertrophic scars stay roughly the same size as the original breakout, while keloids grow beyond the original area.
Topical Retinoids for Mild Scarring
If your scars are shallow and your main concern is uneven texture, topical retinoids are the most accessible starting point. These vitamin A derivatives speed up skin cell turnover and, more importantly, stimulate the deeper skin layer to produce new collagen over time. You can get prescription-strength versions from a dermatologist or use over-the-counter retinol products at lower concentrations.
The key with retinoids is patience. Three months is typically enough to clear active acne, but scar remodeling is a slower process. It takes roughly six months of consistent use before the deeper collagen stimulation produces a visible change in scar texture. Retinoids work best as a complement to other treatments rather than a standalone solution for anything beyond very mild scarring.
Microneedling for Moderate Scars
Microneedling uses a device covered in fine steel needles to create thousands of tiny punctures in the skin. This controlled injury triggers your body’s wound-healing response, prompting it to lay down fresh collagen in the scarred area. For acne scars, the needles used are typically 1.5 to 2 mm long, reaching into the upper dermis where scar tissue sits. Deeper scars occasionally call for needles up to 2.5 to 3 mm.
Professional microneedling (not the at-home rollers, which are too shallow to remodel scars) is one of the more affordable in-office options and works across a range of skin tones with a lower risk of discoloration compared to some laser treatments. Most people need three to six sessions spaced about a month apart. Downtime is minimal: redness and mild swelling for one to two days.
Laser Resurfacing for Deeper Improvement
Fractional lasers are among the most effective tools for acne scars. They work by creating microscopic columns of damage in the skin, leaving surrounding tissue intact so it can drive faster healing. This triggers significant collagen remodeling in the scarred areas.
A systematic review of fractional laser treatments found that most patients experienced 30% to 70% improvement in scar appearance. Treatment protocols vary widely. Some people undergo two to three sessions spaced a month apart, while others may need up to five or seven sessions over several months depending on scar severity. The average cost of laser skin resurfacing is around $1,829 per session, according to the American Society of Plastic Surgeons.
Recovery depends on the type of laser. CO2 lasers (ablative) are more aggressive and deliver stronger results, but recovery generally takes up to two weeks. Erbium lasers require about one full week. In both cases, your skin will become dry and begin peeling about five to seven days after treatment. Non-ablative lasers have shorter downtime but require more sessions to achieve comparable results.
Subcision for Rolling Scars
Rolling scars are often caused by fibrous bands of scar tissue tethering the skin surface down to deeper layers. Subcision is a minor procedure where a needle is inserted beneath the scar to break these bands, allowing the skin to release and rise back to a more even level.
This technique works best for rolling scars and is not ideal for deep boxcar or ice pick scars. In a study of 45 patients who received subcision combined with microneedling, 95.6% showed measurable improvement. About 18% of patients perceived 75% to 100% improvement in their scars, while another 24% reported 50% to 74% improvement. The majority (55.5%) saw 25% to 49% improvement. Side effects were mild: slight redness, swelling, and soreness lasting one to two days.
Chemical Peels and TCA CROSS
Standard chemical peels can improve overall skin texture and tone, but for individual deep scars, a specialized technique called TCA CROSS is more targeted. This involves applying a high concentration of trichloroacetic acid (70% to 100%) directly into the base of an atrophic scar using a small applicator. The acid triggers an intense healing response that builds new collagen from the bottom of the scar upward, gradually raising the depressed area closer to the surrounding skin level.
TCA CROSS is particularly useful for ice pick scars, which don’t respond well to broader surface treatments. It’s typically repeated every four to six weeks over multiple sessions. Each treatment causes a small white frost at the application site, followed by a scab that heals over the next week or so.
Dermal Fillers for Immediate Volume
For deep, individual scars that create a noticeable shadow or depression, injectable fillers can restore lost volume beneath the scar. Only one filler material (a synthetic compound called PMMA) is FDA-approved specifically for acne scars. Hyaluronic acid fillers are commonly used off-label but are temporary, typically lasting 6 to 18 months before the body absorbs them and re-treatment is needed. PMMA is considered semi-permanent.
Fillers provide the most immediate visible result of any option on this list, but they treat the symptom (lost volume) rather than rebuilding the skin itself. They’re often most useful as part of a combination approach alongside treatments that stimulate actual collagen production.
Red and Dark Marks vs. True Scars
Many people searching for scar treatments are actually dealing with discoloration left behind after a breakout, not a permanent change in skin texture. Red or pink flat marks (postinflammatory erythema) are caused by dilated blood vessels near the skin’s surface and are especially common in lighter skin tones. Brown or dark patches (postinflammatory hyperpigmentation) result from excess melanin production and are more common in darker skin tones.
These marks are not scars and will fade on their own over months, though treatments can speed the process. For persistent redness, pulsed dye laser treatments have shown strong results, sometimes improving marks significantly in just one or two sessions. For dark marks, topical treatments containing ingredients like azelaic acid, vitamin C, or niacinamide can help accelerate fading. Sunscreen is essential during this process, since UV exposure darkens these marks and slows healing.
Why Combination Treatments Work Best
Dermatologists rarely rely on a single treatment for moderate to severe acne scarring. A typical plan might involve subcision to release tethered rolling scars, followed by fractional laser or microneedling to resurface the area, with TCA CROSS applied to individual ice pick scars. Fillers might be added for a few particularly deep depressions. This layered approach addresses different scar types and depths simultaneously and tends to produce better overall results than repeating the same procedure.
Timing matters too. Most collagen-stimulating treatments need four to eight weeks between sessions to allow the remodeling process to progress. Rushing treatments doesn’t improve outcomes and can increase the risk of complications. A realistic timeline for a full treatment plan is six months to a year, with continued gradual improvement for several months after the final session as collagen continues to remodel beneath the surface.