Acne scar types: ice pick, boxcar and rolling
atrophic acne scars · scar classification · 'types of acne scars'
Most people researching acne scars start by trying to name what they see in the mirror, and 'types of acne scars' is searched steadily in Singapore before people book a consultation.
Search interest: about 250 searches a month in Singapore for “types of acne scars” (Ahrefs, October 2026).
Most faces need all three, in order.
Reviewed against the Aesthetics International standard. Category: Conditions.
What works for each type of acne scar?
Established. Most faces need all three, in order. The widely used classification by Jacob and colleagues, summarised in a 2010 review, divides atrophic scars into ice-pick, boxcar and rolling and links each to treatment.
- Verdict
- Established Long clinical track record. Results depend on selection and technique more than on the device.
- Evidence base
- 4 PubMed-indexed studies cited below, including systematic reviews.
- Suits
- Anyone with acne scars who wants to understand their scar mix before choosing treatment — the first step of any honest scar plan.
- Not for
- Treating red or brown post-acne marks as scars; single-device packages promised to fix every scar type.
- In Singapore
- Acne scar treatment in Singapore is offered by doctors using fractional lasers, RF microneedling, subcision and TCA CROSS.
- Category
- Conditions · about 250 searches a month in Singapore for “types of acne scars”
- Reviewed
- 6 October 2026 by Aesthetics International. Revised as evidence and regulation change.
What it is
Atrophic acne scars — the depressed kind — are classified into three main shapes. Ice-pick scars are narrow (under 2 mm), deep and sharply defined. Boxcar scars are wider, with steep edges and a flat base. Rolling scars are broad, shallow undulations caused by fibrous bands tethering the skin to deeper tissue. Raised hypertrophic and keloid scars are a separate group, and dark or red marks are not scars at all.
How it works
Each shape needs a different tool. Ice-pick scars are reached with TCA CROSS or punch techniques; boxcar scars respond to fractional resurfacing, RF microneedling and, for deep ones, punch elevation; rolling scars need subcision to release the tether, often followed by resurfacing or volume. Most faces have a mixture, which is why combined, staged protocols outperform any single device.
What the evidence says
The widely used classification by Jacob and colleagues, summarised in a 2010 review, divides atrophic scars into ice-pick, boxcar and rolling and links each to treatment. A 2020 review updates the classification and treatment options. Agreement between experts in classifying individual scars is only moderate, as a 2013 study showed, which is one reason a hands-on assessment in good light matters more than a photo.
What people are saying
Paraphrased from public discussion on TikTok, Instagram, Reddit and in the press. Not testimonials, and not about any one clinic. Reported in: reddit.com, reddit.com.
What the studies show
- review
Atrophic acne scars are classified as ice-pick, boxcar and rolling, each with different anatomy and preferred treatments.
Acne scars: pathogenesis, classification and treatment. — Dermatol Res Pract, 2010. PMID 20981308.
- review
Updated classification and treatment options emphasise matching modality to scar morphology and combining treatments for mixed scarring.
Acne Scars: Classification and Treatment. — Skinmed, 2020. PMID 32501799.
- observational study
Expert agreement on classifying individual acne scars was only moderate, highlighting the need for careful in-person assessment.
Classification of acne scars is difficult even for acne experts. — J Eur Acad Dermatol Venereol, 2013. PMID 22329412.
- systematic review
Subcision suits rolling scars and TCA CROSS suits ice-pick scars, with combination approaches outperforming single techniques.
A systematic review of treatments for acne scarring. Part 1: Non-energy-based techniques. — Scars Burn Heal, 2017. PMID 29799567.
Studies are selected for relevance and quality, not for agreement with the verdict; PubMed records are linked so the reader can check them.
Who it suits
Suits
Anyone with acne scars who wants to understand their scar mix before choosing treatment — the first step of any honest scar plan.
Not for
Treating red or brown post-acne marks as scars; single-device packages promised to fix every scar type.
Alternatives
The two reviewed treatments most often weighed against Acne scar types, on the same standard.
| Acne scar types | Pico laser | RF microneedling | |
|---|---|---|---|
| Verdict | Established | Vetted | Vetted |
| What it is | Atrophic acne scars — the depressed kind — are classified into three main shapes. | A picosecond laser delivers energy in pulses a thousand times shorter than the nanosecond lasers that came before it. | Insulated or non-insulated microneedles deliver radiofrequency energy at a chosen depth below the surface. |
| Evidence base | 4 PubMed-indexed studies cited below, including systematic reviews. | 4 PubMed-indexed studies cited below, including systematic reviews. | 3 PubMed-indexed studies cited below, including systematic reviews. |
| Suits | Anyone with acne scars who wants to understand their scar mix before choosing treatment — the first step of any honest scar plan. | Sun spots, freckles, post-acne marks, tattoo ink, uneven tone in Asian skin when energy is set conservatively. | Acne scars, enlarged pores, early laxity, melasma-prone skin that cannot take ablative lasers, and selected body contouring when the plane is mapped first. |
| In one line | Most faces need all three, in order. | The variable that matters is depth, not brightness, and pigment already deposited is only half the problem; the inflammation producing it is the other half. | The tissue plane, not the device, decides whether you tighten skin or remodel fat. The brand war is a distraction from that. |
Risks
Misclassification leads to the wrong treatment and wasted sessions; that is the main risk this page addresses.
In Singapore
Acne scar treatment in Singapore is offered by doctors using fractional lasers, RF microneedling, subcision and TCA CROSS. Because Asian skin pigments easily after inflammation, plans are staged and conservative.
“Most faces need all three, in order.”
Vetted protocols on the same problem
Questions
What are the three types of acne scars?
Which acne scar type is hardest to treat?
Are red marks after acne scars?
Can one laser treat all acne scars?
How do I find out my scar type?
Do I need to clear active acne first?
Cite this review
Aesthetics International (2026). Acne scar types: ice pick, boxcar and rolling: does it work? Evidence, risks and verdict. https://aesthetics-international.org/treatments/acne-scar-types/ (reviewed 6 October 2026).
Editorial, unpaid and independent of any manufacturer. Verdict: Established. See what works and what doesn't across all 153 reviews. Spotted an error or a newer study? Suggest a correction — changes are logged on the corrections page. Terms are defined in the glossary.
Where this review is used
Have a question about this treatment?
Ask us — or ask to be matched with a practitioner in Singapore who follows evidence-based treatment. Whether it is right for you is decided at an in-person assessment, not by a review; sometimes the answer is a different treatment, or none.
WhatsApp +65 8023 7170Suggest a treatment to review
Physicians, manufacturers and readers can propose a treatment for review. Reviews are editorial and are not paid for.
[email protected]