In short. Scar type decides the instrument, not severity. Some acne scars are reached by heat beneath the surface, some by removing it, and some by neither.
Key points
- Does the scar move freely with the skin, or is it bound to the tissue beneath?
- Free scars are a surface and texture problem, which the two routes here address in different ways.
- Bound scars are a release problem, and neither route releases them.
Acne scarring is the most common reason patients ask about either of these treatments, and the most common reason they are offered the wrong one. The mistake is to treat scarring as a single condition with a severity, when it is a set of different problems that need to be identified scar by scar before a plan can be made.
Why severity is the wrong measure
Two patients can have scarring of similar overall depth and need different procedures, because the visible depth is not the finding that decides. What decides is the relationship between the scar and the tissue beneath it, and the state of the surface over it. A scar whose base moves freely with the skin is a different problem from a scar bound down to what lies underneath, even when the two look alike in a photograph.
The scars a surface route reaches
Removal of the surface layer changes the texture and the surface contour of scarring, and can reduce the sharpness of the shadow that makes a depression look deeper than it is. It is chosen where the surface is the problem and the surrounding skin can tolerate a period of open healing. It cannot lift a scar that is tethered, and treating a tethered scar with resurfacing alone usually produces a modest change that disappoints.
One question sorts most scar plans
Does the scar move freely with the skin, or is it bound to the tissue beneath? Free scars are a surface and texture problem, which the two routes here address in different ways. Bound scars are a release problem, and neither route releases them.
The scars the other route reaches
Heat delivered beneath an intact surface changes some scars over a course of sessions, and is chosen where the surface over the scar is intact and the surrounding skin would not tolerate removal of its outer layer. It does not resurface, so the change in surface contour is smaller. What it offers instead is a route available to skin that could not safely take an open healing phase, built gradually over visits.
The scars neither route reaches
Scars bound down to the tissue beneath them are released mechanically, and the surface treatment then happens around it. Some individual scars are better removed and the skin closed, particularly narrow ones that respond poorly to resurfacing. Both are procedures rather than courses, and both sit outside this comparison. A plan that does not identify which scars fall into which group will produce a partial result and no explanation for it.
What has to be settled before scar treatment
- Acne that is still active, which is usually brought under control first rather than resurfaced through.
- Scars that are still maturing, since a scar that is still changing is assessed again before treatment.
- A tendency for scars to thicken or spread, which changes what the healing phase itself may produce.
No route here removes a scar, and any plan promising complete removal describes something that does not exist. What an honest plan does is name each scar, say what each part of the treatment is aimed at, and say which scars are not being treated and why.
Frequently asked questions
Does the depth of my acne scarring decide which treatment I need?
Less than patients expect. What decides is whether the scar is tethered to the tissue beneath it, whether the surface over it is intact, and how the surrounding skin heals. A deep scar with an intact surface may suit the route that works underneath, while a shallower tethered scar may need a procedure that releases it.
Can either treatment make acne scarring worse?
Neither is expected to worsen scarring, and both carry a small risk of scarring from the treatment itself, which is higher in a patient whose scars already thicken. A flare of pigment is a more common problem than new scarring, and skin that is still actively breaking out is usually treated first.
What if my scarring responds to neither treatment?
Then a different procedure is the honest answer. Scars tethered to deeper tissue are released mechanically, and some individual scars are better removed and closed. Resurfacing then becomes something done around that treatment rather than instead of it, and the plan should say which scar each part addresses.
Risks & Limitations
- No result can be guaranteed, and healing times vary between people.
- Pigment change after an ablative treatment may fade only partly, or not at all.
- Heat delivered below the skin can injure the fat beneath it, and that change is lasting.
- Neither route removes a scar or tightens loose skin, and further treatment may be needed.
When to Seek Care
- Blistering, spreading redness or worsening pain in a treated area.
- Fever, or discharge or warmth from skin that is healing.
- A cold sore outbreak after treatment in a patient with a history of them.
- Any new or changing mark on treated skin, which should be examined rather than observed.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) — skin resurfacing and safety guidance
- National Institute for Health and Care Excellence (NICE, UK) — relevant guidance
- Cochrane Library — systematic reviews on resurfacing and scarring
- Chinese Medical Association Plastic Surgery Branch — clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.