Pitted acne scars form when deep breakouts destroy collagen in the skin, leaving depressions that don’t fill in on their own. Getting rid of them typically requires professional treatments that either rebuild collagen from within, resurface the damaged skin, or physically lift the depressed tissue. The best approach depends on the type of pitted scar you have, since different shapes respond to different treatments.
The Three Types of Pitted Scars
Not all pitted scars are the same, and identifying yours is the first step toward choosing the right treatment. Ice pick scars are narrow, deep, and V-shaped, like a small puncture in the skin. Boxcar scars are wider with sharp, defined edges and a flat bottom, almost like a chickenpox scar. Rolling scars have smooth, sloping edges that create a wave-like texture across the skin. Many people have a mix of all three.
This matters because a treatment that works beautifully on rolling scars may barely touch an ice pick scar. Most dermatologists assess your specific scar pattern before recommending a plan, and the most effective plans often combine more than one technique.
Microneedling and RF Microneedling
Traditional microneedling uses tiny needles to create controlled micro-injuries in the skin, triggering your body’s wound-healing response and prompting new collagen production. It works well for mild to moderate texture issues and produces improvements in skin tone and smoothness over a series of sessions. Downtime is relatively short, usually a day or two of redness.
RF (radiofrequency) microneedling adds heat energy delivered through insulated needles into deeper layers of the skin. This combination of mechanical injury plus thermal energy stimulates collagen at a deeper level than standard microneedling, making it a better option for deeper scars and noticeable skin laxity. RF microneedling produces more significant collagen remodeling and skin tightening, which is why it’s increasingly popular for moderate to severe pitted scarring. Most people need three to four sessions spaced about a month apart.
Laser Resurfacing
Fractional lasers are among the most effective tools for pitted acne scars. They work by vaporizing tiny columns of damaged skin, which triggers deep collagen remodeling as the skin heals. There are two main types worth knowing about.
Fractional CO2 lasers operate at a wavelength that penetrates deeply into the skin. This deeper reach makes them particularly effective for textural problems like acne scars, but the trade-off is more thermal damage to surrounding tissue, which means longer recovery. Expect about five to seven days of significant redness and peeling, with residual pinkness lasting a few weeks. Results continue to improve for months after treatment as new collagen forms.
Erbium YAG lasers use a wavelength that skin absorbs more efficiently, which means less heat spreads to surrounding tissue. Recovery is shorter and side effects are milder, but studies show they don’t match the results of CO2 lasers for deep acne scars. They’re a reasonable option if you want improvement with less downtime, but for significant scarring, CO2 lasers consistently outperform them.
Non-ablative fractional lasers are the gentlest option. They leave the skin’s surface intact while delivering energy to deeper layers. Recovery is minimal, often just a day of mild swelling, but results are more modest and require more sessions.
TCA CROSS for Deep Scars
TCA CROSS (Chemical Reconstruction of Skin Scars) is a targeted technique where a high concentration of trichloroacetic acid, typically 70% or higher, is pressed into individual scars using a small wooden applicator. The acid causes a controlled chemical injury at the base of the scar, stimulating the skin to produce new collagen and gradually raise the depressed area.
This method is especially useful for ice pick scars, which are too narrow and deep for most lasers to reach effectively. In clinical studies, 60% of patients saw marked improvement and another 30% saw moderate improvement. The results build over multiple sessions. After six treatment courses, 70% of patients achieved an excellent response. Sessions are typically spaced two to four weeks apart, and recovery time is shorter than a full chemical peel since only the individual scars are treated rather than the entire face. You’ll see small white dots where the acid was applied, which crust over and heal within a week or so.
Subcision for Rolling Scars
Rolling scars look depressed because fibrous bands of scar tissue underneath are literally pulling the skin’s surface downward. Subcision addresses this directly: a needle is inserted beneath the scar and used to cut those tethering bands. Once released, the skin can rise back to its normal level. The wound-healing response also deposits new collagen in the area, adding volume over time.
Subcision is the go-to treatment for rolling scars and distensible scars (ones that flatten out when you stretch the skin). It can be repeated every six weeks if needed. Some bruising is normal and can last a week or two. Subcision is often combined with other treatments for better results, since freeing the scar from below makes surface-level treatments like lasers or fillers more effective.
Dermal Fillers
Injectable fillers can immediately raise depressed scars to the level of surrounding skin. They’re particularly useful for rolling scars and broader boxcar scars. How long they last depends on what’s injected.
- Hyaluronic acid fillers provide immediate volume. One study showed sustained improvement at a two-year follow-up with no significant fading, though results vary. These fillers carry the advantage of being dissolvable if the result isn’t ideal.
- Poly-L-lactic acid works as a biostimulator, gradually encouraging your skin to produce its own collagen. Results can last up to four years, making it one of the longer-lasting options. It works especially well in people with thin skin.
- Calcium hydroxylapatite is a semi-permanent filler that can improve rolling scars after just one session, with improvement maintained for at least 12 months.
- PMMA (polymethylmethacrylate) is a permanent filler that provides structural support and triggers ongoing collagen production. In one study, 10 out of 14 patients saw moderate to significant improvement after one to two sessions combined with subcision. Because it’s permanent, it’s generally not a first-choice option.
Overall, filler effects range from three to six months on the short end to well over two years depending on the product. Biostimulatory fillers that prompt your body to build its own collagen tend to last longest.
Why Combination Treatments Work Best
Single treatments rarely deliver dramatic results for moderate to severe scarring. Research consistently shows that combining techniques in the same treatment plan, and sometimes even the same session, produces better outcomes than any one approach alone. For example, one study found that combining chemical peeling, subcision, and fractional CO2 laser over four to six months achieved ideal results that none of those treatments could match individually.
A common combination approach might look like subcision first to release tethered rolling scars, TCA CROSS for any deep ice pick scars, and then fractional laser resurfacing to smooth the overall texture. Your dermatologist can sequence these based on your scar types and how your skin responds to each step.
Skin Tone and Treatment Safety
If you have medium to dark skin, the risk of post-inflammatory hyperpigmentation (dark spots left behind by treatment) is a real concern with more aggressive procedures, particularly ablative lasers. The deeper the laser penetrates and the more heat it generates, the higher this risk. Non-ablative lasers, microneedling, TCA CROSS, and subcision tend to be safer options for darker skin tones because they cause less surface-level disruption. Fillers carry no pigmentation risk at all. A dermatologist experienced with diverse skin types can adjust treatment parameters or choose lower-risk approaches to minimize complications.
Timing After Isotretinoin
The traditional recommendation has been to wait 6 to 12 months after finishing isotretinoin (Accutane) before starting scar treatments, based on concerns about impaired wound healing. However, a pilot study challenged this guideline: 10 patients began non-ablative fractional laser treatment within one month of completing isotretinoin, received three sessions spaced four weeks apart, and all healed normally with no complications, including no abnormal scarring. While this doesn’t mean every procedure is safe immediately after isotretinoin, it suggests the old waiting period may be unnecessarily long, at least for gentler laser treatments. More aggressive procedures like ablative CO2 laser may still warrant a longer wait.
What Realistic Results Look Like
Pitted acne scars can be significantly improved, but complete elimination is rare. Most treatments aim for 50 to 75% improvement in scar depth and texture over a series of sessions. Collagen remodeling is a slow biological process, so final results from any given treatment typically take three to six months to fully appear. A multi-step treatment plan for moderate scarring might span six months to a year, with gradual improvement building at each stage.
Costs vary widely based on the treatment type, number of sessions, and geographic location. Laser resurfacing and RF microneedling tend to be the most expensive per session, while TCA CROSS is relatively affordable. Most acne scar treatments are considered cosmetic and aren’t covered by insurance, so it’s worth discussing a phased approach with your provider if budget is a factor.