Acne Scars: Which Treatment Fits Which Type (Boxcar, Rolling, Icepick)

“Acne scar treatment” isn’t a single thing — the treatment that works well for one type of scar can do very little for another, because the different scar types have genuinely different physical structures under the skin. Understanding which type you’re dealing with is the first real step toward a treatment plan that actually works.

Boxcar scars

Boxcar scars are wide, U-shaped depressions with sharply defined edges, similar in shape to chickenpox scars. They form because tissue loss during the original breakout was relatively even across a defined area, leaving a broad, flat-bottomed depression rather than a narrow pit.

These tend to respond reasonably well to treatments that stimulate collagen across a broader area, such as microneedling radiofrequency, since the goal is filling in a wide, shallow depression from underneath.

Rolling scars

Rolling scars have a softer, wave-like appearance, with sloping edges rather than sharp borders — they get their name from the way they can make skin look like it has a subtle rolling texture under certain lighting. These form because of damage to the deeper connective tissue that normally tethers skin smoothly to the layer beneath it, creating a binding that pulls the surface down unevenly.

Because the underlying issue is a structural tethering problem rather than simple volume loss, rolling scars sometimes benefit from a technique that releases that tethering (subcision) before or alongside resurfacing treatments like microneedling.

Icepick scars

Icepick scars are narrow, deep, and sharply defined — often described as looking like a small puncture mark, similar to what an icepick would leave. These are generally considered the most difficult type to treat, precisely because they’re deep and narrow rather than broad and shallow, which limits how effectively many resurfacing treatments can reach the base of the scar.

Deeper icepick scars sometimes require more targeted approaches, occasionally combining techniques, and often need a longer treatment course than boxcar or rolling scars to see meaningful improvement.

Why mixed scarring is actually the most common case

Most people with acne scarring don’t have just one type — a combination of boxcar, rolling, and icepick scars in the same area is common, which is exactly why a single, one-size-fits-all treatment often produces underwhelming results. A proper assessment identifies which types are present and in what proportion, then builds a plan that may combine more than one technique.

Why this assessment matters more than the specific device name

It’s tempting to research a specific treatment name and ask a clinic if they offer it — but the more useful question is which combination of techniques your specific scar pattern actually needs. Our acne and acne scar treatment page covers how we assess scar type before recommending a plan, rather than defaulting to one treatment for every kind of scarring.