Acne scars are not all the same — three main types exist, and each responds best to different treatments. Korean dermatology has refined an approach that matches scar type to optimal treatment, often combining modalities for comprehensive improvement. This guide explains classification and treatment selection.
The three main acne scar types
Boxcar scars
- Round or oval depressions with sharp vertical edges.
- Wider than deep typically.
- 4–10mm typical width.
- Sharp, defined borders.
- Resembles chickenpox scars.
- Most common type.
Icepick scars
- Narrow, deep punctate depressions.
- Resemble narrow needle holes.
- Less than 2mm wide typically.
- Extend deep into dermis.
- Hardest to treat.
Rolling scars
- Wide, sloped depressions.
- Soft, undulating borders.
- 4–5mm or wider.
- Caused by underlying tethering bands.
- Wave-like appearance across skin.
Treatment matched by type
Boxcar scars
Best treatments
- Fractional CO2 laser (workhorse).
- Punch elevation for individual scars.
- TCA CROSS (chemical reconstruction of skin scars).
- Subcision for tethered scars.
- Filler for shallow scars (temporary).
Korean approach
- Series of fractional CO2 (3–6 sessions).
- TCA CROSS for individual deeper boxcars.
- Combined modalities standard.
- Punch elevation for select scars.
Icepick scars
Best treatments
- TCA CROSS — gold standard.
- Punch excision for largest.
- Punch elevation occasionally.
- Fractional laser as adjunct.
- Most challenging scar type.
TCA CROSS technique
- High-concentration TCA applied to scar bottom.
- Causes controlled depth injury.
- Stimulates collagen at scar base.
- Fills in depression.
- Series of treatments needed.
Rolling scars
Best treatments
- Subcision (cuts tethering bands).
- Fillers for immediate improvement.
- Fractional radiofrequency.
- Combined fractional laser + subcision.
- Often best results among scar types.
Subcision technique
- Needle inserted under scar.
- Cuts fibrous bands tethering scar.
- Allows scar to "release" up.
- Combined with filler injection.
- Series of treatments.
Korean comprehensive treatment protocols
Standard combination approach
- Fractional CO2 laser series.
- TCA CROSS for icepick scars same day.
- Subcision for rolling scars between sessions.
- Topical regimen between treatments.
- 3–6 month treatment course.
Mixed-type scarring (most patients)
- Most patients have multiple types.
- Each type addressed appropriately.
- Comprehensive single treatment plan.
- Greater improvement vs. single approach.
Detailed treatment options
Fractional CO2 laser
- Workhorse for acne scarring.
- Creates microscopic injury patterns.
- Stimulates collagen remodeling.
- 5–10 days downtime per session.
- 3–6 sessions typical.
- Cost: ₩300,000–₩800,000 per session.
Erbium fractional laser
- Less aggressive than CO2.
- Shorter downtime (3–5 days).
- More sessions needed.
- Better for sensitive skin or darker skin types.
RF microneedling
- Combines microneedling with RF.
- Deep dermal stimulation.
- Less downtime than fractional laser.
- Good for rolling scars.
- Cost: ₩300,000–₩700,000 per session.
Subcision
- Specific to tethered scars.
- Hypodermic needle technique.
- Combined with filler often.
- Series of 3–4 sessions.
- Cost: ₩200,000–₩500,000 per session.
TCA CROSS
- For icepick scars specifically.
- High-concentration TCA at scar base.
- Localized chemical injury.
- Series of 3–6 treatments.
- Cost: ₩100,000–₩300,000 per session.
Punch excision
- For deepest icepick or boxcar scars.
- Surgical removal of individual scars.
- Sutured closed.
- Linear scar replaces depression.
- Healing 7–14 days.
Punch elevation
- For boxcar scars.
- Scar punched out and re-elevated.
- Sutured at higher level.
- Better for matched skin elevation.
Filler for scars
- HA filler in scar bottom.
- Temporary improvement (6–12 months).
- For shallow boxcar or rolling scars.
- Maintenance treatment.
- Cost: ₩400,000–₩800,000 per session.
PRP / PRF
- Platelet-rich plasma/fibrin.
- Adjunct to other treatments.
- Stimulates healing.
- Series approach.
Korean Asian skin specific considerations
Higher PIH risk
- Post-inflammatory hyperpigmentation common.
- Treatment must avoid worsening.
- Conservative parameters.
- Sun protection essential.
- Tranexamic acid as adjunct.
Combined treatment with pigmentation
- Most patients have both scars and PIH.
- Combined laser approach.
- Picosecond laser for pigmentation.
- Comprehensive protocol.
Treatment timeline
Initial consultation
- Detailed scar mapping.
- Individual scar typing.
- Photographic documentation.
- Treatment plan customized.
Active acne first
- Active acne controlled before scar treatment.
- Isotretinoin completion if used.
- 6+ months acne-free preferable.
- Avoid creating new scars during treatment.
Treatment series
- 3–6 months active treatment phase.
- Multiple modalities combined.
- Progress assessed at 6 months.
- Maintenance phase ongoing.
Pricing in Korean clinics 2026
- Comprehensive treatment package: ₩2,000,000–₩6,000,000.
- Per session approach: ₩200,000–₩800,000.
- Annual maintenance: ₩1,000,000–₩3,000,000.
- USD: $1,500–$4,600 typical comprehensive course.
Realistic expectations
- 50–80% improvement realistic for most patients.
- Not always complete elimination.
- Better outcomes for fresh vs. old scars.
- Patience essential (months for results).
- Maintenance preserves results.
- Some scars more responsive than others.
What scars respond best
- Rolling scars: best response typically.
- Shallow boxcar: good response.
- Deep boxcar: moderate response.
- Icepick: most challenging.
- Mixed types: comprehensive approach helps all.
For international patients
- Treatment series needs multiple visits or extended stay.
- Single trip can have 1–2 sessions.
- Follow-up at home if available.
- Continue topical regimen.
- Long-term commitment.
Lifestyle and skincare
- Sun protection critical.
- Topical retinol between treatments.
- Vitamin C serum.
- Hydrating products.
- Avoid further acne scarring.
The honest framing
Acne scar treatment requires understanding scar types and matching treatments accordingly — Korean dermatology has refined this approach over decades of experience. The patients who get the best outcomes have proper scar classification and customized multi-modal treatment plans, accept the multi-session timeline, and commit to maintenance. The patients who pursue single-modality treatment for mixed scarring often see partial results. Match the treatment to the scar type, combine modalities for comprehensive improvement, and accept the patience required for collagen remodeling to manifest as visible improvement.