Pimple scars can be treated with a range of approaches, from over-the-counter topicals to in-office procedures like microneedling and laser resurfacing. The right option depends on what type of scarring you actually have, because not all marks left behind by acne are true scars, and the ones that are come in different forms that respond to different treatments.
Dark Marks vs. True Scars
Many people searching for scar treatment are actually dealing with discoloration, not structural scarring. After a pimple heals, it often leaves behind a flat dark or reddish spot. These marks fall into two categories: dark brown or purple patches (common in medium to deep skin tones) caused by excess pigment deposited during inflammation, and pink or red spots (more visible on lighter skin) caused by lingering blood vessel activity. Neither involves a change in skin texture, and both fade on their own over months.
You can speed that fading significantly with the right topicals. Azelaic acid works by suppressing excess pigment production and targeting overactive pigment cells. It’s available over the counter at concentrations up to 10% and by prescription at 15% to 20%. Retinoids, vitamin C serums, and niacinamide also help. Daily sunscreen is non-negotiable here, because UV exposure darkens these marks and stalls the fading process. If your concern is flat discoloration with no pitting or texture change, you likely don’t need a procedure at all.
The Three Types of Depressed Scars
True acne scars involve actual loss or distortion of skin tissue. The vast majority are atrophic, meaning they sit below the surrounding skin surface. They come in three distinct shapes, and recognizing yours matters because each responds differently to treatment.
- Ice pick scars are small, narrow indentations that taper down into the skin like a puncture. They’re the deepest and most stubborn type.
- Boxcar scars are broader depressions with sharp, defined edges, almost like a crater with vertical walls.
- Rolling scars have sloping edges and varying depth, creating a wavy, uneven texture across the skin.
Most people have a mix of all three. Understanding which type dominates helps you and a dermatologist choose the right approach.
Topical Retinoids for Mild Scarring
Retinoids are the most accessible starting point for mild textural scarring. They work by stimulating the skin’s fibroblasts (the cells responsible for producing collagen) to lay down new collagen and organize it into healthier patterns. This gradually thickens the dermis beneath shallow scars, making them less noticeable over time. Retinoids also reduce the enzymes that break down existing collagen, so the improvement compounds.
Over-the-counter options include adapalene (0.1%), which is available without a prescription and well-tolerated. Prescription tretinoin ranges from 0.01% to 0.1% and produces stronger collagen stimulation at higher concentrations, though irritation increases too. Results take months of consistent nightly use. Retinoids won’t erase deep ice pick or boxcar scars, but they can visibly soften shallow rolling scars and improve overall skin texture. They also work well as a maintenance step alongside professional procedures.
Microneedling
Professional microneedling uses a device with fine needles to create thousands of controlled micro-injuries across the scarred skin. This triggers a three-phase healing response. In the first few days, your skin releases growth factors that initiate repair. Over the next two weeks, fibroblasts migrate to the area and start producing fresh collagen and elastin. Then, over the following one to six months, that new collagen matures and reorganizes, which is when you actually see texture improvements.
The number of sessions you’ll need depends on your scar type. Mild rolling scars often show significant softening after 3 to 5 sessions. Boxcar scars typically need 4 to 6. Ice pick scars are the hardest to treat this way and may require 6 to 8 or more sessions, often combined with other techniques. Sessions are spaced about four to six weeks apart, and the first couple of treatments usually won’t produce visible changes. Most people notice the texture catching light differently around sessions 3 to 4, with consolidated improvement by sessions 5 to 6. Collagen remodeling continues for up to six months after your final session, so the results keep developing after you’re done.
Laser Resurfacing
Laser treatments remove or remodel layers of skin to trigger deeper collagen production than topicals or microneedling can achieve. The two main ablative lasers used for acne scars work at different intensities.
CO2 lasers penetrate deeper into the skin, generate more heat, and produce more tightening. They’re the stronger option for moderate to severe scarring, but recovery takes roughly 7 to 10 days, and the treated skin stays pink for two to three months afterward. In some cases, the pinkness can linger for up to a year. Erbium lasers are more precise and superficial, with less heat damage to surrounding tissue. Recovery is faster, usually 2 to 5 days, making them a better fit for lighter resurfacing or for people who can’t take extended downtime.
Both types now come in fractional versions, which treat only a fraction of the skin surface in a grid-like pattern, leaving islands of untouched skin between the treated spots. This dramatically speeds healing while still triggering significant collagen remodeling. Fractional treatments typically require multiple sessions but have a much lower risk of complications than full-surface lasers.
After laser resurfacing, you’ll need to clean the treated areas multiple times daily, keep the skin moisturized, and avoid picking at any crusting. Sunscreen becomes essential once healing is complete, because the new skin is highly vulnerable to sun damage and pigmentation changes. You can generally resume retinoid products about six weeks after treatment.
TCA CROSS for Ice Pick Scars
Ice pick scars are notoriously resistant to broad surface treatments because they’re so narrow and deep. The TCA CROSS technique addresses this by applying a high concentration of trichloroacetic acid (65% to 100%) directly into individual scars using a fine-tipped applicator. The acid causes controlled damage inside the scar channel, which triggers collagen production from the bottom up, gradually raising the depressed scar to meet the surrounding skin.
This is done in a series of sessions. In one study, 70% of patients reached an excellent response after six sessions, with progressive improvement at each visit. Another 25% achieved good improvement at the same point. The procedure is quick and relatively inexpensive compared to lasers, though each session causes temporary white frosting at the application site followed by a small scab that heals over a week or so. TCA CROSS is often combined with other treatments like microneedling or laser for patients with mixed scar types.
Subcision for Rolling Scars
Rolling scars look wavy because fibrous bands of scar tissue tether the skin’s surface down to deeper layers. Subcision directly addresses this. A needle is inserted beneath the scar and moved in a fan-like motion to physically cut those tethering bands. Once released, the skin can lift back to a more even plane. The pocket of space created beneath the scar also fills with blood, which forms a connective tissue matrix that adds volume as it heals.
Subcision works best on rolling scars and other depressed scars that flatten out when you stretch the skin. It’s not effective for deep ice pick scars. The procedure is often paired with fillers or microneedling in the same visit to maximize results. Multiple sessions may be needed for stubborn tethering.
Dermal Fillers
For individual depressed scars, particularly boxcar and rolling types, injectable hyaluronic acid fillers can restore volume beneath the scar and lift it to match the surrounding skin. The results are immediate, which makes fillers appealing for people who want visible improvement without waiting months for collagen remodeling. Research shows hyaluronic acid fillers used for acne scars can last as long as 10 years in some cases, far longer than the 6 to 12 months typical for fillers used in other facial areas. The longevity likely comes from the filler being placed in a relatively static area with less movement and absorption.
Fillers don’t change the scar tissue itself, so they’re often used alongside treatments that stimulate actual collagen production. They’re a practical option for a small number of prominent scars rather than widespread textural issues.
Choosing the Right Combination
Most people with noticeable acne scarring benefit from combining treatments rather than relying on a single approach. A common strategy starts with subcision to release tethered rolling scars, follows with a series of microneedling or fractional laser sessions to rebuild collagen across the broader area, and uses TCA CROSS to target remaining ice pick scars individually. Retinoids support the process throughout by maintaining collagen turnover between sessions.
Skin tone matters in treatment selection. Darker skin tones carry a higher risk of post-treatment hyperpigmentation with aggressive laser treatments, so microneedling and chemical techniques are often preferred. Lighter skin tones generally tolerate ablative lasers well but still need strict sun protection during recovery. A dermatologist who regularly treats acne scars can assess your specific scar types, skin tone, and tolerance for downtime to build a realistic plan. Expect the full process to take six months to a year for moderate scarring, with continued subtle improvement beyond that as collagen matures.