Acne scars can be meaningfully improved, but the right approach depends on the type of scar you’re dealing with and how deep it goes. Some treatments work well at home over months of consistent use, while others require professional procedures that trigger your skin to rebuild collagen from the inside out. Most people see the best results from combining approaches rather than relying on a single treatment.
First, Know What You’re Actually Treating
Before spending money on any treatment, figure out whether you have true acne scars or post-inflammatory hyperpigmentation. These are completely different problems. Hyperpigmentation is the dark or reddish spots left behind after a breakout. The skin is flat and smooth to the touch, just discolored. These marks fade on their own over weeks to months and respond well to simple topical treatments like vitamin C serums, niacinamide, and sunscreen.
True acne scars involve permanent changes to your skin’s texture. You can feel them with your fingertips. They come in three main types:
- Ice pick scars are small, narrow holes that point deep into the skin, most common on the cheeks. These are the hardest type to treat and often require aggressive, repeated procedures.
- Boxcar scars are broad, box-shaped depressions with sharp edges, usually found on the lower cheeks and jaw where skin is thicker.
- Rolling scars have sloping edges and varying depth, giving skin a wavy, uneven look. Unlike the other types, they don’t have a sharp drop-off at the border.
Some people also develop raised scars (hypertrophic or keloid), where the body overproduces collagen during healing. These require a different treatment strategy entirely, often involving steroid injections or silicone sheets to flatten the excess tissue.
What Topical Treatments Can Do
Topical products won’t erase deep scars, but they can genuinely improve texture over time by stimulating your skin to produce new collagen. Tretinoin (prescription-strength retinoid) is the most studied option. A 24-week course of adapalene at 0.3% concentration improved skin texture by one to two grades in over half of patients tested. Tretinoin at 0.05% has been shown to flatten atrophic scars in roughly 79% of patients when used as part of a broader protocol. These aren’t overnight fixes. You’re looking at months of nightly use before texture changes become noticeable.
Over-the-counter retinol works on the same principle but at lower potency, so results take longer and are more subtle. If you’re starting out, a retinol product lets you build tolerance before moving to prescription-strength options. Pair any retinoid with daily sunscreen, since these ingredients make your skin significantly more sensitive to UV damage.
Microneedling for Moderate Scars
Microneedling uses fine needles to create controlled micro-injuries in the skin, triggering your body’s wound-healing response and new collagen production. In clinical studies, about 18% of patients reported 75% to 100% improvement in their acne scars, roughly a quarter saw 50% to 74% improvement, and 55% experienced 25% to 49% improvement. Most people fall into that last group: noticeable but not dramatic change.
Professional microneedling uses motorized pen-shaped devices with needles long enough to reach the deeper layers of skin where living cells, nerves, and blood vessels sit. The FDA recommends having this done by a trained provider because of the depth involved. Common side effects include redness, bruising, tightness, and peeling that resolve within days to weeks. Less common risks include infection, changes in skin pigmentation, and cold sore flareups.
At-home derma rollers use shorter, blunter needles that primarily exfoliate the surface layer of dead skin. They can brighten and smooth skin slightly, but they don’t penetrate deeply enough to trigger the collagen remodeling that actually fills in scars. If you’re serious about results, professional treatments are worth the investment.
Laser Resurfacing
Fractional CO2 laser resurfacing is one of the most effective treatments for moderate to severe acne scars. The laser removes tiny columns of damaged skin while leaving surrounding tissue intact, which speeds healing and stimulates deep collagen rebuilding. A typical course involves treatments once a month for three months, and studies show significant improvement in both texture and scar depth at one, three, and six months after the final session.
The recovery process matters more than most people expect. Your skin will be red, swollen, and peeling for one to two weeks after each session. Initial texture smoothing appears within two to four weeks as new skin with improved collagen structure reaches the surface. But meaningful scar reduction doesn’t become visible until two to three months out. Optimal results emerge six to 12 months after completing your treatment series, as deep collagen remodeling finishes. This timeline frustrates people who expect instant results, but the biology simply takes that long.
Subcision for Tethered Scars
Rolling scars often look depressed because fibrous bands underneath the skin pull the surface downward, like tiny anchors. Subcision addresses this directly. A provider inserts a needle beneath the scar to physically cut those tethering bands, releasing the skin surface and allowing it to rise. The procedure also triggers connective tissue formation underneath the scar without injuring the surface.
The limitation is that recurrence rates are relatively high. The scar can re-tether as it heals. To counter this, many providers combine subcision with filler injections or suction techniques to keep the released skin elevated while new tissue forms underneath. Subcision works best for rolling scars specifically and is often used as a first step before layering on other treatments like microneedling or laser.
Chemical Peels and the CROSS Technique
For ice pick scars, which are notoriously difficult to treat with lasers or microneedling alone, a technique called CROSS (chemical reconstruction of skin scars) can be remarkably effective. A provider applies highly concentrated trichloroacetic acid (70% to 100%) directly into each individual scar using a fine-tipped applicator. This triggers intense collagen production at the base of the scar, gradually building up the depressed area from below.
This is not the same as a standard chemical peel you’d get for general skin rejuvenation. The concentration is far higher and the application is pinpoint-precise. Repeated sessions can normalize deep rolling and boxcar scars, and even deep ice pick scars respond to the higher concentrations. Each session produces a small white frost mark at the scar site that scabs over and heals within a week or so.
Dermal Fillers for Immediate Volume
If you want visible improvement quickly, injectable fillers can physically raise depressed scars by adding volume beneath them. The longevity varies dramatically by filler type. Collagen-based fillers last about six months. Hyaluronic acid fillers have shown sustained results lasting up to two years in follow-up studies. Poly-L-lactic acid fillers work by stimulating your own collagen production over time, with benefits lasting as long as four years in some cases.
Autologous fat (harvested from your own body) offers complete biocompatibility and the potential for long-lasting correction, though it requires a more involved harvesting procedure. Fillers work best for broader, shallower depressions like boxcar and rolling scars. They’re less practical for numerous tiny ice pick scars scattered across the cheeks.
Why Combination Approaches Work Best
Most dermatologists treating acne scars don’t rely on a single method. A common approach for someone with mixed scar types might start with subcision to release tethered rolling scars, follow with filler to maintain the lift, then layer on a series of microneedling or laser sessions to improve overall texture. Ice pick scars might get targeted CROSS treatments between broader resurfacing sessions. A prescription retinoid used at home between professional visits helps maintain collagen stimulation between appointments.
The total timeline for a comprehensive treatment plan typically spans six to 18 months. Collagen remodeling is a slow biological process that can’t be rushed, and most procedures need multiple sessions spaced weeks apart. Setting realistic expectations from the start helps. The goal for most people is significant improvement in texture and appearance, not flawless skin. A 50% reduction in scar visibility can make a dramatic difference in how your skin looks and feels, even if the scars aren’t completely gone.