3 Acne Scar Types, Different Devices — Why One Laser Isn't Enough
Dr. Big explains Ice Pick / Boxcar / Rolling respond to different devices — a matrix matching scar to procedure (TCA CROSS, ablative fractional, subcision, RF, NAFL) and why one face needs several devices combined. Acne scar clinic Ratchathewi, near BTS.
Quick answer: One laser isn’t enough because the three acne scar types each have a different under-skin structure: Ice Pick suits TCA CROSS, Boxcar suits ablative fractional laser, and Rolling suits Subcision plus RF microneedle and non-ablative fractional laser. Since one face usually mixes several types, combining procedures per zone is what makes acne scars improve ~60–80%.
“Doctor, why doesn’t one laser finish it — why several machines?” Dr. Big answers in one line: because acne scars aren’t all one type.
There are 3 main types, each with a completely different structure under the skin. Using one device for every scar is like using one screwdriver for every screw size — it fits some, but misses most. This article lays out the scar-to-procedure matrix clearly.
3 types differ by “shape under the skin”
- Ice Pick — narrow mouth, deep, like a needle puncture, steep walls plunging deep
- Boxcar — sharp edges, flat base, like a vertical-walled crater, shallow or deep
- Rolling — sloping edges, wide waves, from bands pulling the skin down from beneath
For how to identify each yourself, read How to tell which acne scar you have — this article focuses on “which device each needs, and why they differ.”
Matrix: which scar pairs with which procedure
| Scar type | Problem structure | Matching procedure |
|---|---|---|
| Ice Pick | Narrow, deep, plunging walls | TCA CROSS / ablative punch — point-specific wall remodeling |
| Boxcar | Vertical edges, flat base | Ablative fractional laser (CO2 / Er:YAG) — soften the edges |
| Rolling | Bands pulling from beneath | Subcision + RF microneedle + NAFL to stimulate collagen |
The table shows no device is good at every scar — different problems:
- TCA CROSS applies concentrated acid only at the ice pick base to trigger collagen to push the wall up — precise, point by point, not full-face firing
- Ablative fractional laser suits boxcars by softening vertical edges
- Subcision is the hero of rolling scars (release bands first), followed by RF microneedle / NAFL (non-ablative fractional, e.g. Er:Glass, Thulium) for extra collagen
What many don’t know — one face usually has several types mixed
This is the key point: most people don’t have just one type. One cheek may have Ice Pick here, Boxcar there, Rolling in another zone, all mixed. So firing one device across the whole face — however good — handles only some scars; the rest remain, making it feel “not much better” when really the device didn’t match every scar type.
At Clarity, Dr. Big assesses your face by zone, not in bulk — then designs a program mixing several procedures in one set so each zone gets the device that truly matches it.
Why “combining procedures” beats one device
Good acne scar treatment isn’t measured by the most expensive machine, but by matching the device to each scar type.
Layered planning is the key — release bands with subcision for Rolling, handle the Ice Pick base with TCA CROSS, soften Boxcar edges with fractional laser, then finish with whole-face collagen stimulation. When every scar type is addressed precisely, the total comes out 60–80% better (not 100% — read How much can acne scars improve). Each procedure also needs time for collagen to mature before the next round — explained at Why wait 4–8 weeks between sessions.
Frequently asked questions
Q: How many acne scar types are there? A: Mainly 3 — Ice Pick (narrow deep), Boxcar (vertical edges), Rolling (wave edges) — each with a different under-skin structure, responding to different devices.
Q: What is TCA CROSS, which scar? A: Concentrated TCA applied only at the scar base to trigger collagen to push the wall up — suited to narrow deep Ice Picks that subcision can’t reach.
Q: Can one laser finish it? A: Usually not — one face has several mixed types; one device handles only some. Combining procedures per zone works better.
Q: How do I know how many devices my face needs? A: A doctor assesses your real face by zone — send a photo via LINE and Dr. Big will identify your scar types and plan.
Q: Where can I get a case assessed? A: At Clarity Clinic Ratchathewi, near BTS, easy to reach from Siam, Phaya Thai, all of Bangkok — message LINE for a case-specific plan.
Summary
The 3 acne scar types — Ice Pick, Boxcar, Rolling — have different structures, so they need different procedures: Ice Pick with TCA CROSS, Boxcar with ablative fractional laser, Rolling with subcision + RF + NAFL. Because one face usually has several types mixed, combining procedures per zone beats firing one device across the whole face — which is why the doctor plans a program, not sells one machine.
Contact:
- LINE: @clarityclinic — send a photo of your acne scars for Dr. Big to review
- Location: Spring Tower, B Floor · Ratchathewi, near BTS (Siam, Phaya Thai, all Bangkok)
- Free 30-minute consult with Dr. Big in person
- Price 5,000 baht/session including all main procedures · pay per session, no course packages
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References
Outcomes vary by individual; this article is educational, not a substitute for in-person medical assessment.