The short answer
These are not rivals. Subcision works beneath a scar, and fractional laser works on it from above. One asks whether something is pulling the scar down from inside. The other asks whether the surface can be smoothed.
A simple stretch test helps. A surface scar flattens when the skin is stretched, and a tethered scar stays pinned. Most faces carry more than one type, and a single device often improves only some scars. Dr Sin Yong plans scar by scar.
Subcision vs laser, scar by scar
| Scar type | What is usually used |
|---|---|
| Rolling, pinned | Subcision first, then resurfacing or RF microneedling |
| Boxcar, flattens on stretch | Resurfacing or RF microneedling, with no subcision needed |
| Boxcar, pinned | Release, then resurfacing |
| Ice-pick | TCA CROSS or point treatment |
| Flat red or brown marks | Treated as redness or pigment, not scars |
| Raised, hypertrophic or keloid | Not released or resurfaced. Injection or silicone, assessed separately |
The tools named
A fine needle or blunt cannula passes under the scar, without a surface incision, in the subcutaneous plane. It is a doctor-performed procedure under local anaesthetic.
The S3 Resurfacing Lift on the DEKA Tetra Pro makes multi-depth columns reaching the scar floor.
FSX Laser is surface-directed, for superficial and textural scarring, with settings chosen for Fitzpatrick III to V.
Secret DUO uses insulated needles for dermal remodelling, sparing the surface. It is the preferred energy device on darker skin, and suits rolling and shallow boxcar scars once any tether is gone.
For ice-pick scars and small, deep boxcar scars.
Placed into a released space to hold the scar up while collagen forms. 4D Scar Reconstruction names Radiesse for this. Recovery is minimal.
The usual order
Who should wait
Active acne, since new lesions create new scars. Also infection, a keloid tendency, isotretinoin use not yet reviewed, a bleeding tendency, and pregnancy.
Raised, changing or unusual scars.
Marked, widespread scarring beyond what release and resurfacing can improve goes to a plastic surgery specialist.
What neither can do
No laser frees a tethered scar, and smoothing its surface leaves the pull in place. Neither subcision nor laser is the usual treatment for ice-pick scars. Resurfacing can worsen raised scars. Neither returns skin to an unmarked state. Scars are improved in stages, and the plan is adjusted as your skin responds.
Risks and recovery
Bruising, swelling and tenderness that settle over days. Uncommonly, a small lump where blood collects, which is reviewed.
Redness, crusting and a recovery needing care. In Fitzpatrick III to V skin, the main risk is darkening. S3 has the highest pigment risk and longest recovery of the four named methods.
Crusting for about a week. Pigment change is possible, so test spots are used on darker skin.
Redness and pinpoint marks for days.
Sessions and fees
No fixed course is promised at the start, and no session count is given. Steps are spaced so the skin settles between them. The fee depends on the number and type of scars, the steps planned and how they are staged. A written quote follows assessment, and no prices are listed.