Subcision for Acne Scars in Malaysia: Releasing Tethered Rolling Scars
Some acne scars aren't a surface problem at all — they are pulled down from underneath by fibrous bands. No amount of resurfacing lifts them until those bands are released. That is what subcision does. This is a dermatologist's guide to how subcision treats rolling and tethered acne scars, and how we combine it with laser for the best result. At Loh & Celine Skin Specialist Clinic, Alor Setar, Kedah.
Book a Dermatologist ConsultationDoes subcision work for acne scars?
Quick answer
Yes — for tethered scars. Subcision is one of the most effective treatments for rolling and other tethered (“bound-down”) acne scars, because it releases the fibrous bands that pull the skin down from underneath. It is not a resurfacing treatment, so it is usually combined with fractional CO₂ laser or microneedling to smooth the surface as well. It is minimally affected by skin colour, which makes it useful in Asian skin.
The honest summary:
- Subcision targets the tethering under a scar, which surface treatments cannot release.
- It works best for rolling scars and other tethered depressions — not for deep ice-pick scars.
- It is usually combined with resurfacing (CO₂ laser or microneedling) for a complete result.
- Because it involves no heat or acid on the surface, the pigmentation risk is low, which suits darker skin.
- The main downtime is bruising, which settles over a week or two.
What is subcision?
Subcision is a minor in-office procedure that releases scars which are tethered — bound down — to the deeper tissue. The name means “cutting from beneath.”
Under local anaesthesia, a fine needle or blunt cannula is inserted through a tiny entry point and moved in a controlled fan-like motion just under the scar, cutting the fibrous bands that anchor the scar base to the tissue below. Once those bands are released, the depressed scar can lift, and the healing response lays down new collagen in the freed space.
It is a technique that addresses the architecture beneath a scar — something no cream, peel or surface laser can do.
How does subcision work?
- Release. The needle or cannula severs the fibrous tethering bands that hold the scar down.
- Lift. Freed from its anchor, the depressed scar rises toward the level of the surrounding skin.
- Collagen formation. The controlled injury and the small pocket created underneath stimulate new collagen, which helps support the lift over the following weeks.
- Progressive improvement. Results build as healing and remodelling continue, often over more than one session.
As always, the honest language is lift, release and improve — not “erase.” Some tethering can re-form, which is one reason subcision is often repeated and combined with other treatments.
Which acne scars respond best to subcision?
| Scar type | Role of subcision |
|---|---|
| Rolling scars | The strongest indication — tethering is the core problem. |
| Tethered / bound-down scars | Useful wherever a scar is anchored to deeper tissue. |
| Deep boxcar | Sometimes helpful as part of a combination approach. |
| Ice-pick scars | Not the right tool — these need TCA CROSS. |
| Wide shallow / textural | Better suited to fractional CO₂ resurfacing. |
A simple bedside test: if a depressed scar improves when the skin is stretched, tethering is contributing and subcision is likely to help.
Needle vs blunt cannula subcision
Subcision can be done with a sharp needle (often a Nokor or hypodermic needle) or a blunt-tipped cannula. Both release the bands, but they behave differently:
- Sharp needle — effective and widely used, but creates multiple entry points and tends to cause more bleeding and bruising.
- Blunt cannula — enters through a single point and glides under the skin, generally causing less bleeding and bruising and allowing a wider area to be released safely. Comparative studies suggest cannula subcision can be at least as effective, with a gentler recovery.
The right choice depends on the scars, the area and the plan; we select the technique to suit your situation.
Subcision with laser, microneedling & fillers
Is subcision used on its own?
Usually not. Subcision releases the tether, but the surface texture and any collagen loss are best addressed alongside it. That is why subcision is frequently combined with fractional CO₂ laser or RF microneedling, and sometimes with a small amount of filler to support the freed scar while new collagen forms.
A typical combined plan for mixed scars might pair subcision for the tethered rolling scars, TCA CROSS for the ice-pick scars, and fractional CO₂ laser to refine the overall surface — sequenced and spaced for the skin. Flat pigmentation is a separate issue handled with Pico laser.
Subcision & Asian skin
Subcision has a particular advantage in Fitzpatrick III–V Malaysian skin: because it works mechanically under the skin with no heat and no acid on the surface, the risk of post-inflammatory hyperpigmentation is low compared with ablative resurfacing. This makes it a comparatively safe way to treat rolling scars in darker skin.
The main considerations are bruising, and — as with any procedure in tethered scars — the small chance of a raised nodule forming as it heals, which we watch for and manage. Sun protection remains sensible around any bruising.
What happens during subcision?
- Assessment. Your scars are examined and stretch-tested to confirm which are tethered and suitable for subcision.
- Local anaesthesia. The treatment area is numbed so the procedure is comfortable.
- Release. A fine needle or blunt cannula is passed under each tethered scar and moved to cut the fibrous bands.
- Pressure & aftercare. Firm pressure is applied to limit bruising, and you're given aftercare instructions. Any combined laser or microneedling may be staged at the same visit or separately.
Exact technique and whether treatments are combined in one session are decided individually.
Recovery, sessions & results
Downtime is mainly bruising and mild swelling over the treated area, which typically settles over one to two weeks; a blunt cannula tends to bruise less than a sharp needle. Tenderness for a few days is normal.
Sessions. Many people need more than one treatment. Clinical reports commonly describe a small number of sessions — often around one to four, spaced roughly a month or more apart — with the plan tailored to scar severity and response. We reassess between sessions rather than promising a fixed number.
Results build as the released scars lift and new collagen forms over weeks to months. Because tethering can partially re-form, subcision is often repeated and combined with resurfacing to hold and refine the improvement.
Risks & side effects
- Bruising and swelling — the most common effect; more with a sharp needle than a cannula.
- Bleeding or a small collection of blood (haematoma) — usually minor and settles.
- Tenderness for a few days.
- Post-inflammatory hyperpigmentation — less likely than with heat-based treatments, but possible.
- Raised nodules — occasionally a firm bump can form as the scar heals; usually manageable.
- Infection — uncommon with proper technique and aftercare.
- Scarring, including rare keloid formation in predisposed individuals.
Risk depends on technique, area, patient factors and aftercare. We will not claim it is “risk-free” — we will explain the actual risks and how we reduce them.
Dr Celine's approach
When I examine rolling scars, I stretch the skin to see how much of the depression is tethering rather than surface texture. If the scar lifts when stretched, subcision is usually part of the plan. From there I combine it with fractional CO₂ laser or RF microneedling for the surface, TCA CROSS for any ice-pick scars, and Pico for pigmentation — sequenced over time for the individual.
Frequently asked questions
Is subcision the best treatment for rolling scars?
For tethered rolling scars, subcision is one of the most effective treatments because it releases the fibrous bands causing the depression — something resurfacing alone cannot do. It is usually combined with laser or microneedling for the surface.
How many subcision sessions will I need?
Many people need more than one — often around one to four sessions spaced about a month or more apart, depending on scar severity and response. We reassess between sessions rather than promising a fixed number.
Does subcision hurt?
The area is numbed with local anaesthesia first, so the procedure is comfortable. Afterwards you can expect tenderness and bruising for a few days.
How long is the bruising?
Bruising and mild swelling are the main downtime and typically settle over one to two weeks. A blunt cannula generally causes less bruising than a sharp needle.
Is subcision safe for Asian skin?
It is comparatively well suited to darker skin because it uses no heat or acid on the surface, so the pigmentation risk is lower than with ablative resurfacing. Bruising and, rarely, a healing nodule are the main considerations.
Can subcision be combined with CO₂ laser?
Yes, and it frequently is. Subcision releases the tethered scar while fractional CO₂ laser or microneedling smooths the surface — often the best result for rolling scars comes from combining them.
Can subcision treat ice-pick scars?
No — ice-pick scars are narrow and deep, not tethered, and respond better to TCA CROSS. Subcision is for tethered rolling and bound-down scars.
How do I know if subcision is right for my scars?
An in-person assessment with a stretch test shows how much of a scar is tethering. Dr Celine examines your scars and skin, then advises whether subcision — alone or combined with laser or TCA CROSS — is appropriate.
Written & medically reviewed by our dermatology team
Serving patients from Alor Setar and across Kedah, as well as Sungai Petani, Penang, Perlis and northern Malaysia.
Not sure whether subcision is right for your scars?
Rolling scars are tethered from underneath, and releasing that tether is the key to lifting them. During consultation, Dr Celine stretch-tests and assesses your scars, then advises whether subcision — usually combined with laser resurfacing — will give you the best result.
References & further reading
- Subcision in acne scarring: a review of clinical trials. J Cosmet Dermatol. 2023.
- Gheisari et al. Blunt cannula subcision is more effective than Nokor needle subcision for acne scars treatment. J Cosmet Dermatol. 2019.
- Combination approach: carbolic CROSS, blunt bi-level cannula subcision and microneedling in all skin types. J Clin Aesthet Dermatol (JCAD).
- DermNet: Subcision.
© Loh & Celine Skin Specialist Clinic, Alor Setar, Kedah, Malaysia.