Subcision with Filler, RF Microneedling or CO₂ Laser: What Follows the Release

Rolling scars are held down from beneath: fibrous bands anchor the skin's underside to deeper tissue, and no amount of surface work lifts skin that is still pinned. That is the case for subcision as the structural first step — a needle or blunt cannula passed under local anaesthetic cuts the bands, the skin rises, and the released space fills with a small pocket of blood that acts as a natural spacer supporting new collagen.

But release alone has a known weakness: cut bands can partially reform as the area heals, pulling some of the lift back down. And subcision does nothing for the surface itself — the skin over a released scar keeps whatever texture, edges and tone it had before. This is why most well-designed plans treat subcision as step one of a sequence: something to preserve the space that was released, and something to remodel the surface once the structure is free.

The moment the bands are cut, a race begins between two healing outcomes: new collagen building in the freed space and holding the skin up, versus the fibrous tethering re-forming and pulling it back down. A spacer tips that race in the right direction by physically keeping the released surfaces apart while collagen establishes.

The default spacer is the one subcision creates itself — the controlled blood pocket beneath the released scar, which is why doctors do not aggressively compress the area afterwards. In some cases the doctor augments this: saline can be infiltrated to hydrodissect and hold the plane open, or a small amount of dermal filler can be placed into the released space, supporting the lifted skin directly while longer-term collagen builds. Filler after subcision is a targeted structural aid for suitable scars — a different job from the volumising most people associate fillers with, and a case-by-case decision based on scar depth, location and how the release behaves.

Once the structure is free, the surface becomes worth treating — and the two main remodelling tools are RF microneedling and fractional CO₂ laser. Both work by triggering controlled collagen remodelling; they differ in how they deliver the stimulus and what that costs you in downtime.

RF microneedling drives fine needles into the dermis and releases radiofrequency heat at depth, largely sparing the surface — recovery is typically shorter, and the surface-sparing delivery is a meaningful advantage in Asian skin tones where post-inflammatory hyperpigmentation is the complication to avoid. Fractional CO₂ ablates microscopic columns of skin from the surface down, giving strong texture remodelling — often the stronger choice for sharp boxcar edges — at the cost of several days of visible redness and micro-crusting. Neither is universally superior; the choice follows your scar mix, skin tone and downtime tolerance, and some plans stage both across a course.

The interval between subcision and resurfacing is not arbitrary. In the first weeks after release, the treated area is swollen, bruised and structurally busy — the spacer is organising, early collagen is forming, and the skin's true post-release level has not yet emerged. Resurfacing into that environment means treating a moving target and stacking inflammation on inflammation.

By around four to six weeks, swelling has resolved, the surface has settled, and the doctor can see which scars held their lift and which partially re-tethered — information that shapes exactly where the resurfacing energy should go. The same logic spaces repeat subcision sessions four to eight weeks apart. Good sequencing is mostly the discipline of letting each step finish its work before judging it and starting the next.

Patients researching subcision increasingly ask about adjuncts — most often Rejuran S, a thicker, scar-focused formulation of polynucleotide injectable, discussed as a way to support skin quality and collagen in treated scars. There are also questions about subcision for concerns beyond acne scars, such as cellulite dimples or nasolabial folds, where the technique has been described.

Our position on both is the same and deliberately boring: assessed case-by-case at consultation. DrPlus offers subcision for facial acne scarring — tethered rolling scars — and adjuncts like Rejuran S are considered where an individual plan genuinely benefits, not added by default. Other described uses of the technique are discussed honestly at consultation if you raise them, but the clinic's focus, and this article set's, is acne scars. If an add-on cannot be justified to you in one plain sentence at consultation, it does not belong in your plan.