Depressed Acne Scars: What I Check Before Choosing a Treatment

TL;DR: Depressed acne scars come in three shapes, icepick, boxcar, and rolling, and each one answers to a different treatment. When you're evaluating a clinic in Seoul, ask how the provider examines your scar shape under magnification rather than which machines are on the price list, and ask whether the recovery plan is built around how many days you're actually staying. Our clinic sits inside the hotel building where many patients are already staying, so the procedure and the recovery days can run on one continuous track.

I don't start a consultation by naming a procedure. I start with a magnifying lens, looking at the wall of the scar, the base, and how deep it runs. Two scars can look like the same kind of pitting on the surface and still need treatment aimed at completely different layers of skin.

The shape decides the approach, not the other way around

A 2025 review in Frontiers in Medicine concluded that no single procedure covers every depressed acne scar, and laid out a match by subtype: icepick scars responding to TCA CROSS and picosecond laser, boxcar scars to fractional laser and microneedling, and rolling scars to subcision paired with hyaluronic-acid-based filler. That's the order I work through in a consultation. I identify which shape or combination of shapes is present before I talk about any device.

Rolling scars are the clearest example of why shape matters more than the device catalog. A 2022 review in Clinical, Cosmetic and Investigational Dermatology on non-energy-based treatments for atrophic acne scarring found that rolling scars form when the dermis is pulled down to the layer beneath it by fibrous bands, and that subcision is the only approach in that review shown to generate enough mechanical force to break those bands and let the skin surface rise back toward its surroundings. Resurfacing the top layer without addressing that tether leaves the shadow in place, because the pull underneath hasn't been released.

Icepick scars raise a separate problem: depth, not tethering. Skin Therapy Letter's review on acne scar management notes that icepick scars taper narrowly into the deep dermis, so conventional resurfacing may not reach far enough to correct them, and punch excision is sometimes considered as a more targeted first step for that shape.

Skin tone changes how far I push intensity

The same 2025 Frontiers in Medicine review reported that ablative fractional lasers, including CO2 and Er:YAG systems, deliver strong results but carry a higher risk of post-inflammatory hyperpigmentation and prolonged redness in Fitzpatrick skin types III through VI. Non-ablative lasers and radiofrequency devices produce a gentler improvement curve with less downtime in exchange. For most of the East Asian patients I treat, that risk profile is exactly why I start conservatively and split treatment into staged sessions instead of pushing for a single aggressive pass.

I design the plan backward from how many days you're staying

Most patients who come to us are in Seoul for somewhere between two and seven days. Once I've identified the scar shape, the working question becomes how far redness and scabbing can realistically settle within the days that remain, and that answer sets both the intensity and the sequence of what we do. If the scar needs more than one session to reach a meaningful result, I don't try to compress that into a single aggressive first visit.

Our Gangnam location is on the second and third floors of the UH FLAT SIGNATURE Gangnam hotel building. Patients can take the elevator back to a room after a procedure, and the oxygen chamber and vitamin IV drip are provided at no charge to hotel guests. Japanese, Chinese, and English-speaking staff are on site, so consultation notes and recovery instructions can be confirmed in a patient's own language. I've written more on what to verify before a procedure in Korea in our safety guide.

FAQ

Will one treatment session remove the depression completely?

Usually not. Scars fill in as collagen reorganizes over time, so the number and spacing of sessions is what determines the outcome, and if more than one scar shape is present, I usually combine more than one approach rather than relying on a single method.

Can icepick scars be treated with laser alone?

Sometimes not adequately. Skin Therapy Letter's review notes that icepick scars extend narrowly into the deep dermis, so resurfacing alone may fall short, and a localized approach such as punch excision is sometimes evaluated first for that shape before any resurfacing follows.

Is it fine to treat scarring while I still have active breakouts?

I generally hold off on scar treatment until inflammation is under control first. If active lesions are still flaring, treating the scar tissue underneath them tends to produce less predictable results, so tell me what you're currently using on your skin at the consultation.

What symptoms after a procedure should prompt me to contact the clinic?

Redness paired with pain or heat, swelling that lasts longer than expected, or any discharge or color change are reasons to contact us right away rather than waiting it out or treating it yourself.