Acne scars can be significantly improved with the right combination of professional treatments, but the best approach depends on the type of scarring you have. Flat dark spots left behind after breakouts are not true scars and respond to much simpler treatments than the textured indentations or raised bumps that result from permanent changes in skin structure. Understanding which type you’re dealing with is the first step toward choosing something that will actually work.
Dark Spots vs. True Scars
Many people searching for acne scar solutions are actually dealing with post-inflammatory hyperpigmentation: flat dark or reddish marks where a pimple used to be. These marks are caused by excess melanin production during the healing process, not by structural damage to the skin. They fade on their own over months, and you can speed that up with topical treatments containing vitamin C, retinoids, or hydroquinone. Chemical peels and intense pulsed light therapy also target pigment effectively.
True acne scars, on the other hand, involve permanent changes in skin texture. They show up as indentations, wavy unevenness, or raised tissue. These require treatments that physically remodel the skin’s deeper layers, and topical products alone won’t resolve them. If you can feel the irregularity when you run your finger across your skin, you’re likely dealing with structural scarring.
The Three Main Types of Indented Scars
Indented (atrophic) scars fall into three categories, and each responds differently to treatment:
- Ice pick scars are small, narrow, deep holes that point down into the skin like a puncture wound. They’re most common on the cheeks and are the hardest type to treat, often requiring aggressive, targeted approaches.
- Boxcar scars are broader depressions with sharp, defined edges. They tend to form on the lower cheeks and jaw, where the skin is thicker.
- Rolling scars have sloping edges and varying depth, making the skin look wavy or uneven. These are caused by bands of scar tissue pulling the skin surface downward from beneath.
Most people have a mix of these types, which is why dermatologists often recommend combining treatments rather than relying on a single approach.
Laser Resurfacing
Fractional CO2 laser treatment is one of the most effective options for moderate to severe acne scarring. The laser creates thousands of microscopic channels in the skin, triggering a wound-healing response that produces new collagen to fill in depressed scars from below. Studies report improvement rates around 38% after two treatment courses, which may sound modest but translates to a noticeable, visible difference in skin texture.
Most treatment plans involve one to five sessions, with three being the most common number studied. Sessions are typically spaced four to eight weeks apart. The cost averages around $2,000 per session for ablative lasers and $1,100 for non-ablative versions, which are gentler but produce less dramatic results. Insurance rarely covers these procedures.
Recovery involves several days of redness, swelling, and peeling. The full benefit takes much longer to appear than you might expect. Initial texture smoothing shows up within two to four weeks, but meaningful scar reduction becomes visible after two to three months. Optimal results don’t emerge until six to twelve months post-treatment, as the collagen your skin produces gradually matures, organizes, and stabilizes into its final form.
Microneedling and RF Microneedling
Microneedling uses a device covered in tiny needles to create controlled micro-injuries across the skin’s surface. Like laser treatment, the goal is to trigger your body’s collagen production, filling in depressed scars and smoothing uneven texture. Traditional microneedling typically requires four to six sessions for visible results, with only one to two days of redness afterward.
Radiofrequency (RF) microneedling adds heat energy delivered through the needles, pushing the collagen-stimulating effect deeper into the skin. This version produces more significant improvement in fewer sessions, typically three to four, and is better suited for deeper scars. The trade-off is slightly more downtime: two to three days of redness and warmth. RF microneedling is the better option for firm, tethered scars, while traditional microneedling works well for mild surface texture issues and enlarged pores.
Subcision for Rolling Scars
Rolling scars have a specific structural problem: fibrous bands of scar tissue beneath the surface are physically pulling the skin downward, creating that wavy, uneven look. No amount of surface-level treatment will fix this if those tethered bands remain intact.
Subcision addresses this directly. A needle is inserted beneath the scar to sever those fibrous bands, releasing the skin so it can rise back to a normal level. The procedure provides significant long-term improvement for rolling scars specifically and is often combined with other treatments like fillers or microneedling for a more complete result. The blood pooling beneath the released scar also contributes to new collagen formation as it heals.
TCA CROSS for Ice Pick Scars
Ice pick scars are too narrow and deep for most surface treatments to reach effectively. A technique called TCA CROSS involves applying a high-concentration acid directly into individual ice pick scars using a small wooden applicator. The acid triggers controlled inflammation deep within the scar, stimulating new collagen to build up from the bottom.
This is a slow, cumulative process. After three treatment courses, only about 20% of patients show excellent improvement. But by six courses, that number climbs to 70%, with an additional 25% showing good improvement. Higher concentrations produce the strongest results, with some studies finding that patients who received the strongest formulations and completed five or six courses all achieved excellent outcomes. Sessions are typically spaced two to four weeks apart.
Dermal Fillers
For individual deep scars, injectable fillers offer an immediate visible improvement by physically lifting the depressed area. Hyaluronic acid fillers are commonly used, though it’s worth knowing that only one type of filler (a synthetic material called PMMA) is actually FDA-approved specifically for acne scars. Hyaluronic acid fillers are temporary, typically lasting six to twelve months before the body absorbs them and the scar returns to its original depth.
Fillers work best as a complement to collagen-stimulating treatments rather than a standalone solution. They provide instant gratification while longer-term treatments like lasers or microneedling do their slower remodeling work.
Topical Treatments for Structural Scars
Prescription retinoids like tretinoin can modestly improve acne scars over time by accelerating cell turnover and stimulating some collagen production. The results are milder than professional procedures but come with fewer side effects and lower cost. Retinoids are most useful for shallow scarring and work well as a maintenance strategy between professional treatments or for people who aren’t ready for in-office procedures.
Over-the-counter products marketed for scar treatment, including most serums and creams, cannot meaningfully change the depth of a true structural scar. They may improve skin tone and surface texture, which can make scars less noticeable, but they won’t rebuild the lost tissue beneath a deep indentation.
Combining Treatments for Best Results
Because most people have a mix of scar types at different depths, the most effective approach is usually a combination. A typical treatment plan might start with subcision to release tethered rolling scars, follow with a series of laser or RF microneedling sessions to stimulate broad collagen remodeling, and use TCA CROSS to target stubborn ice pick scars individually. Fillers can address any remaining deep depressions.
The collagen remodeling timeline applies across all these treatments. Your skin continues improving for six to twelve months after your final session as new collagen matures and stabilizes. Judging results too early, especially in the first few weeks, will give you an incomplete picture of how much improvement you’re actually getting. Patience with this process is not optional. The biology of collagen production simply takes that long, and no treatment can speed it up once the healing signal has been triggered.