A combination of topical treatments, sun protection, and in some cases professional procedures can significantly improve both hyperpigmentation and acne scars. The right approach depends on which problem you’re actually dealing with, because dark spots and true scars are different issues that respond to different strategies.
Dark Spots and True Scars Are Not the Same
Most of what people call “acne scars” are actually post-inflammatory hyperpigmentation, or PIH: flat, discolored spots left behind after a breakout heals. PIH happens because inflammation triggers excess melanin production in the skin. It’s sometimes called “pseudo scarring” because it doesn’t damage the skin’s structure. It fades over time, and topical treatments can speed that process considerably.
True acne scars involve physical changes to your skin’s texture. When tissue is lost during healing, you get indented (atrophic) scars. These come in three shapes: ice pick scars that are narrow and deep, boxcar scars that look like small potholes with defined edges, and rolling scars that create broad, wave-like unevenness on the cheeks. When excess tissue forms instead, you get raised (hypertrophic) scars. Treating texture changes requires different tools than treating discoloration, so identifying what you have is the first step.
Topical Treatments for Dark Spots
Vitamin C
Vitamin C serums work by interfering with tyrosinase, the enzyme your skin needs to produce melanin. The effect is dose-dependent, meaning higher concentrations work better, but only up to 20%. Beyond that, you don’t get additional benefit. For the vitamin to actually penetrate your skin, the formula needs to be acidic, ideally around pH 3.5. Look for serums listing L-ascorbic acid at 10 to 20% with a low pH. Vitamin C also provides antioxidant protection, which helps prevent new dark spots from forming.
Azelaic Acid
Azelaic acid at 15% concentration is one of the better-studied options for PIH. In a 12-week clinical trial, 73% of patients using 15% azelaic acid gel saw their dark spots improve by more than 60%, compared to just 13% in the placebo group. Every single patient in the treatment group saw at least some improvement. It also helps with active acne, making it a practical two-in-one option if you’re still breaking out.
Retinoids
Topical retinoids (tretinoin, adapalene) increase skin cell turnover, which pushes pigmented cells to the surface faster so they shed. They also stimulate fibroblasts in the deeper layers of skin to produce more collagen, which is why retinoids help with both discoloration and mild textural scarring. Tretinoin additionally blocks some of the collagen breakdown caused by UV exposure. Adapalene 0.1% is available over the counter; stronger retinoids require a prescription. Start slowly, since irritation from retinoids can actually trigger more hyperpigmentation if your skin reacts badly.
Hydroquinone
Hydroquinone suppresses melanin production and has long been considered the gold standard for stubborn dark spots. However, it carries real risks. The FDA has received reports of ochronosis (a paradoxical blue-gray discoloration), skin rashes, and facial swelling from over-the-counter hydroquinone products. Currently, the only FDA-approved hydroquinone product is a prescription combination cream approved for short-term use under medical supervision. If you use hydroquinone, it should be for a limited period, not as an indefinite part of your routine.
Sunscreen Is Non-Negotiable
No treatment for dark spots works well without consistent sun protection, because UV exposure triggers the same melanin production you’re trying to reduce. But here’s something most people don’t realize: visible light also darkens skin and worsens hyperpigmentation, particularly in medium to deep skin tones. Visible light makes up about 45% of solar radiation, and standard sunscreens provide limited protection against it.
Tinted sunscreens containing iron oxides solve this problem. In a study comparing tinted iron oxide formulations against a non-tinted mineral SPF 50+ sunscreen, the tinted versions significantly outperformed the untinted sunscreen at preventing visible light-induced pigmentation. A tinted sunscreen gives you UV protection, visible light protection, and cosmetic coverage of existing spots all at once.
Procedures for Indented Acne Scars
If you have actual textural scarring, topical products alone won’t be enough. They can improve mild unevenness over months, but deeper scars need treatments that physically remodel the skin.
Microneedling
Microneedling creates tiny controlled injuries in the skin that trigger collagen production as the skin heals. A typical course involves six sessions spaced two weeks apart. Results are gradual: after one month, patients in one study saw 15 to 20% improvement in scar appearance. By three months, that jumped to 51 to 60% improvement. Rolling scars and boxcar scars respond best. Ice pick scars, because they’re so narrow and deep, show only moderate improvement with microneedling alone.
Fractional Laser Resurfacing
Fractional CO2 laser therapy is one of the most effective options for depressed acne scars. It works by vaporizing tiny columns of skin tissue, stimulating collagen production, and refining skin texture as new skin replaces the treated areas. Comparative studies show fractional CO2 lasers outperform other laser types for acne scars, with higher satisfaction scores from both patients and physicians. Recovery typically involves several days of redness and peeling. Many dermatologists combine laser treatment with other modalities like microneedling or fillers to address different scar types at once, since no single treatment works equally well on all scar shapes.
Special Considerations for Darker Skin Tones
If you have a medium to deep complexion (Fitzpatrick skin types IV through VI), treatment choices require more care. Darker skin is more prone to developing new hyperpigmentation from the very treatments meant to fix it, especially procedures that cause significant inflammation.
Chemical peels can still work, but the type matters. Glycolic acid peels (30 to 70%) are considered the safest and most effective option for darker skin. Salicylic acid peels at 20 to 30% also perform well and carry lower risk. Lactic acid is another good choice. What you want to avoid: deep chemical peels and higher concentrations of trichloroacetic acid (TCA), which carry a real risk of prolonged hyperpigmentation or scarring in dark skin. Even medium-depth peels need extreme caution.
The same principle applies to lasers. Aggressive settings or poorly chosen wavelengths can leave you worse off than before. If you have darker skin, working with a provider experienced in treating your skin type is especially important, since the margin for error is smaller and the consequences of a misstep are more visible and longer-lasting.
Building an Effective Routine
For dark spots without textural scarring, a consistent topical routine handles most cases within three to six months. A practical combination: vitamin C serum in the morning under a tinted sunscreen with iron oxides, and a retinoid at night. Adding azelaic acid (morning or night, depending on what your skin tolerates) accelerates fading. Introduce products one at a time over several weeks so you can identify what irritates your skin before layering everything together.
For true indented scars, start with the topical routine to address any accompanying discoloration, then pursue professional treatments for the texture component. Most people need multiple sessions of whatever procedure they choose, spaced weeks apart, with final results visible months after the last session. Combining a topical retinoid with professional treatments can enhance results, since the retinoid supports ongoing collagen production between sessions.