Acne scarring improves with the right combination of treatments, but the best approach depends on the type of scar you have. Shallow, pitted scars respond to different methods than deep ice pick scars or raised, thickened ones. Most people see meaningful results from a mix of at-home topical products and one or more professional procedures, though improvement takes months rather than weeks.
Why Scar Type Matters
Not all acne scars form the same way. Most fall into two broad categories: atrophic scars, which sit below the surface of surrounding skin, and hypertrophic scars, which are raised and palpable above it. Within the atrophic group, you’ll find shallow pitted scars with smooth borders, deep narrow scars with sharp edges (often called ice pick scars), and broader depressions that give the skin a wave-like texture (rolling scars). Each type involves different depths of tissue damage, which is why a single treatment rarely addresses everything.
Knowing your scar type helps you skip treatments that won’t work well for your situation. Ice pick scars, for example, are too narrow and deep for most surface-level treatments to reach. Rolling scars are often tethered to deeper tissue by fibrous bands that need to be physically released before the skin can flatten. A dermatologist can map your scars by type and recommend a targeted plan.
Topical Retinoids for Mild Scarring
Prescription retinoids are one of the most accessible starting points for mild atrophic scarring. They work by activating specific receptors in skin cells that regulate how proteins are built, which shifts the skin toward producing fresh collagen. Tretinoin in particular strongly stimulates the production of collagen types I and III and improves how newly formed collagen bundles organize themselves. Over time, this remodeling can fill in shallow depressions and smooth uneven texture.
Retinoids also reduce inflammation and suppress enzymes that break down collagen, which helps the skin hold onto its structural gains. Over-the-counter adapalene (sold as Differin) uses a similar mechanism, though it’s less potent than prescription options like tretinoin or tazarotene. Results from topical retinoids are gradual. Expect to use them consistently for several months before texture changes become noticeable, and improvements continue to build over a year or more of regular use.
Microneedling
Microneedling uses a device covered in fine needles to create thousands of tiny, controlled punctures in the skin. These micro-injuries trigger a wound-healing response that generates new collagen in scarred areas. It’s safe for all skin types, including darker skin tones where certain lasers carry a higher risk of pigment changes, and recovery time is relatively short.
In a clinical trial of 20 adults who received three microneedling sessions spaced two weeks apart, participants reported an average 41% improvement in scar appearance. Most people need multiple sessions spaced several weeks apart for best results, so patience is part of the process. Microneedling also pairs well with other treatments. Some practitioners apply platelet-rich plasma during sessions to boost the collagen response.
Laser Resurfacing
Lasers are among the most effective tools for moderate to severe atrophic scarring, and they come in two main categories. Ablative lasers physically remove thin layers of skin to trigger deep collagen remodeling. Non-ablative lasers heat the tissue beneath the surface without removing it, stimulating collagen production with less downtime.
Fractional CO2 lasers are particularly suited for pitted acne scars and deliver dramatic, long-term collagen remodeling. The tradeoff is significant downtime: expect redness, crusting, and peeling for 7 to 14 days, along with strict aftercare. Erbium YAG lasers offer a gentler alternative with 3 to 7 days of recovery, but they’re better suited for mild scarring, fine lines, and sun spots. The results are more subtle.
For darker skin (Fitzpatrick types IV through VI), non-ablative lasers like the Nd:YAG are a safer choice. They resurface the skin and stimulate collagen without causing physical injury to the surface or altering pigment, which significantly reduces the risk of post-inflammatory hyperpigmentation.
Subcision for Tethered Scars
Rolling scars often look indented because fibrous bands beneath the skin pull the surface downward. Subcision directly addresses this. A needle is inserted beneath the scar to break apart the fibrous tissue anchoring it. The bleeding that follows forms a clot in the newly created space, which elevates the scar and triggers new collagen production that further fills the gap over time.
Subcision works well on its own for rolling scars but shows increased efficacy when combined with other treatments like fractional CO2 laser, radiofrequency microneedling, or platelet-rich plasma. For scars with both tethering and surface texture issues, combining subcision with a resurfacing treatment often produces better results than either approach alone.
Chemical Reconstruction for Ice Pick Scars
Ice pick scars are notoriously difficult to treat because they’re narrow and deep. Standard resurfacing methods can’t reach the bottom of these scars effectively. A technique called TCA CROSS was developed specifically for this problem. It involves depositing a small amount of trichloroacetic acid at high concentration (70 to 100%) directly into the base of each individual scar using a fine-tipped instrument like a toothpick. The acid causes controlled damage at the bottom of the scar, which triggers collagen production from the deepest point upward.
Each session gradually raises the scar floor. Most people need several sessions spaced weeks apart before the scar becomes level with surrounding skin. TCA CROSS can be combined with broader resurfacing treatments once the deepest scars have been partially filled.
Fillers and Chemical Peels
Dermal fillers offer an immediate, though temporary, solution for shallow to moderate atrophic scars. Substances like hyaluronic acid, collagen, or your own harvested fat can be injected beneath individual scars to physically lift them to the level of surrounding skin. Results typically last a few months before the filler is naturally absorbed, though some filler types are permanent.
Chemical peels using salicylic acid are one of the safest peeling options for acne scars across all skin types. They help improve surface texture and mild discoloration. Deeper peels using glycolic or trichloroacetic acid can address more significant scarring but carry higher risks for darker skin tones.
Realistic Timelines for Results
Most acne scar treatments take months to show their full effect. Topical retinoids require three to six months of consistent use before texture changes are visible, with continued improvement over a year or longer. Procedural treatments like microneedling, laser resurfacing, and subcision trigger collagen remodeling that unfolds over three to six months after each session, and multiple sessions are usually needed.
Post-inflammatory hyperpigmentation, the dark or red marks left after acne heals, can lighten on its own within several months. For some people, though, these marks persist for years without treatment. Retinoids, vitamin C serums, and sun protection all help speed the fading process.
Protecting Your Skin After Treatment
Recovery care after professional procedures directly affects your results. After laser resurfacing, the treated area should be kept moisturized with petroleum jelly or a prescribed antibacterial cream. Gentle cleansing with a diluted white vinegar solution (one tablespoon of white vinegar per eight ounces of water) alternated with mild liquid soap helps prevent infection while the skin heals.
Avoid applying any over-the-counter or natural products to treated skin unless your provider specifically recommends them, as these can interfere with healing. Skip makeup on the treated area until it’s completely healed. When you need to be outside, use a mineral sunscreen with at least SPF 30 or wear protective clothing. Sun exposure on newly treated skin dramatically increases the risk of lasting pigment changes, especially for darker skin tones.
Considerations for Darker Skin
If you have a medium to deep skin tone, treatment selection requires extra care. Aggressive ablative lasers and deep chemical peels carry a higher risk of triggering post-inflammatory hyperpigmentation, which can leave you with dark patches that are harder to treat than the original scars. The safest professional options include microneedling, salicylic acid peels, Nd:YAG laser treatments, and subcision. A study of 45 patients with dark skin found that combining subcision with microneedling was both effective and inexpensive, with a low risk of pigment complications. Starting with lower-intensity treatments and building up gradually gives your provider a chance to monitor how your skin responds before escalating to more aggressive approaches.