Subcision and dermal fillers are both used to improve atrophic acne scars, but they do so through different mechanisms. Subcision aims to release fibrous bands beneath the skin, while dermal fillers help lift depressed scars by replacing lost volume. Because they target different causes of scarring, one approach is not universally more appropriate than the other.
The choice between treatments depends on scar type, whether scars are tethered or volume-deficient, and patient preferences around result longevity and downtime. This article explains how Subcision and fillers differ in their mechanisms, suitability by scar type, recovery expectations, cost, and safety to help you understand when each treatment, or a combination of both, may be considered.
Why Acne Scars Form
Atrophic acne scars form when inflammation disrupts normal healing. Two key processes contribute: collagen loss and fibrous tethering.
- Collagen loss leads to volume-deficient scars that appear sunken because the dermis lacks structural support.
- Fibrous tethering involves fibrotic strands that anchor the dermis to deeper layers, thereby pulling the skin downward.
Some scars are tethered, making them less responsive to treatments that restore volume alone. Others are primarily caused by volume loss, with little tethering. Understanding which factor predominates helps guide treatment choice.
What Is Subcision for Acne Scars?
Subcision is a minor surgical technique used to treat depressed acne scars caused by fibrous tethering beneath the skin. It is considered a foundational procedure for scars that are resistant to surface-based treatments.
How Subcision Works
A specialised needle is inserted beneath the scar to mechanically release fibrous bands anchoring the skin. Once released, the skin may lift closer to its natural position. The process also initiates a healing response that can support collagen remodelling, contributing to structural improvement over time.
What Types of Acne Scars Respond to Subcision
Subcision is often used for scars where tethering is the dominant mechanism, including rolling and tethered boxcar scars. These scar types may not respond well to volume replacement or surface treatments alone if underlying tethering isn’t addressed.
Considerations and Downtime for Subcision
Bruising and swelling are expected and may last from a few days to a couple of weeks. Social downtime varies by patient. Subcision is not typically used for icepick scars, which require other targeted methods such as TCA CROSS or punch excision.
What Are Dermal Fillers for Acne Scars?
Dermal fillers are injectable treatments used to improve acne scars by restoring volume beneath depressed areas of the skin. Unlike subcision, fillers do not release fibrous bands. They do not release tethered scars but can help lift and smooth depressed areas. Fillers may be used alone for volume-deficient scars or following subcision to refine results.
How Dermal Fillers Work
Dermal fillers treatment work by replacing lost volume, lifting depressed scars closer to the surrounding skin surface. This leads to immediate visible improvement in scar depth.
Some fillers also stimulate collagen production over time, contributing to gradual dermal strengthening beyond the initial volumising effect. However, the primary mechanism remains volume augmentation rather than structural release.
Types of Fillers Used (High Level)
Several types of fillers may be used for acne scars, depending on treatment goals:
- Hyaluronic acid (HA) fillers, which provide temporary volume and are reversible
- Collagen-stimulating fillers, such as poly-L-lactic acid (PLLA), which promote gradual collagen formation
- Semi-permanent fillers, which last longer but require careful patient selection and technique
Each type differs in longevity, reversibility, and maintenance requirements.
What Types of Acne Scars Respond to Fillers
Dermal fillers work for scars that are depressed due to volume loss rather than tethering, including:
- Rolling scars with minimal fibrous anchoring
- Broad, shallow boxcar scars with soft edges
When significant tethering is present, fillers alone may provide limited or short-lived improvement unless combined with subcision.
Limitations of Dermal Fillers
Most dermal fillers provide temporary results, requiring maintenance treatments to sustain improvement. Over time, this can increase long-term cost.
Fillers also have a limited effect on tethered scars when used alone, as they do not address the fibrous bands that pull the skin downward. In such cases, fillers are best used as part of a combination approach rather than a standalone solution.
Subcision vs Fillers — Scar Type Considerations
The suitability of subcision and dermal fillers varies depending on scar morphology and underlying cause. Understanding how each treatment relates to different scar types helps explain why they are often used together rather than as direct substitutes.
Rolling Scars
Rolling scars may be managed using subcision, dermal fillers, or a combination of both, depending on the dominant contributing factor. Subcision is commonly considered when rolling scars are associated with fibrous tethering beneath the skin, which pulls the surface downward. Releasing these fibrous bands can allow the skin to reposition gradually over time. Dermal fillers may also be used to address rolling scars by adding volume beneath depressed areas, thereby reducing shadowing and uneven contour.
Boxcar Scars
Boxcar scars may respond differently to treatment depending on their depth and edge definition.
- Shallow boxcar scars with softer edges may be suitable for dermal fillers, as volume replacement can help elevate the depressed area.
- Deeper or tethered boxcar scars may require subcision to release underlying fibrous attachments before volume-based correction is considered.
For boxcar scars, careful assessment of scar depth, edge sharpness, and tethering is important, as these factors influence treatment planning and expected response.
Ice Pick Scars
Ice pick scars are narrow, deep scars that extend vertically into the skin. Subcision and dermal fillers are generally not used as primary treatments for this scar type. Because ice pick scars are not mainly caused by lateral tethering or volume loss, structural release and volume replacement alone do not adequately address the underlying issue. Targeted treatments such as TCA CROSS or punch excision techniques are typically used. Subcision or fillers may be considered adjuncts to improve the surrounding texture rather than standalone treatments.
Procedure Experience and Recovery
Subcision and dermal fillers differ significantly in terms of procedural experience and recovery, which can influence patient preferences and treatment planning.
Subcision
Subcision is performed as an in‑clinic procedure under local anaesthesia and involves controlled release of tissue beneath the skin. Bruising and swelling are common and may last from several days to a few weeks, depending on the extent of treatment and the individual’s healing response. While most daily activities can be resumed relatively quickly, short‑term social downtime may occur due to visible bruising. Structural changes continue to develop gradually as collagen remodelling takes place.
Dermal Fillers
Dermal filler treatment is an injection‑based procedure that usually involves minimal recovery time. Mild swelling or tenderness may occur, but many patients can return to routine activities shortly after treatment. Fillers provide immediate elevation of depressed scars at the time of injection, which may be suitable for patients who prefer visible change without extended downtime. However, results are temporary and require ongoing maintenance.
Cost Considerations — Subcision vs Fillers
Cost considerations for subcision and dermal fillers typically depend on treatment goals, the number of sessions required, and the expected duration of results.
Subcision ranges from S$400 to S$1,500 in Singapore. It is often performed over a limited number of sessions. Because it targets structural tethering, the observed improvements may persist over time as collagen remodelling occurs. Ongoing sessions may not be necessary once sufficient correction is achieved, though this varies by individual scar response.
Dermal fillers typically have higher per-session costs, ranging from S$300 to over S$1,800 per syringe, depending on the filler type. Most commonly used fillers are temporary and may require repeat sessions to maintain results.
Long-Term Results and Maintenance
The duration of results and frequency of follow-up sessions differ between subcision and dermal fillers. This can influence treatment planning based on whether a patient prefers gradual improvement or more immediate, though potentially temporary, correction.
Subcision
Subcision addresses tethered scars by releasing fibrous bands and stimulating collagen remodelling over time. As a result, patients may continue to see changes in skin contour over several months. While additional sessions may be required, many patients may not require frequent maintenance once improvement has stabilised. However, this can vary depending on the scar type and the individual’s skin healing.
Dermal Fillers
Dermal fillers provide visible volume enhancement soon after injection. Most fillers used in acne scar treatment offer temporary results, with longevity depending on the product type and individual metabolic factors. Some fillers that stimulate collagen production may provide longer-lasting results, though repeat treatments are typically required to maintain the effect.
Risks and Safety Considerations
When performed by experienced practitioners, both subcision and dermal fillers are considered generally safe. However, each has specific considerations related to the procedure and individual risk tolerance.
Subcision
Temporary bruising and swelling are common after Subcision, due to the release of tissue beneath the skin. These effects are usually self-limiting and resolve as part of the natural healing process. As with any minor surgical procedure, risks such as prolonged bruising or uneven response may occur, particularly if the procedure is not performed with appropriate technique.
Dermal Fillers
Dermal fillers may cause localised effects, such as swelling, tenderness, or minor bruising at the injection site. Rare complications like nodules or granulomas can occur and are more likely when inappropriate techniques or product choices are used. Results and safety outcomes depend on precise placement and the treating practitioner’s experience.
Can Subcision and Fillers Be Combined?
Yes. Combining subcision with fillers is commonly used when both tethering and volume loss contribute to the appearance of acne scars. Subcision is typically performed first to address fibrous bands beneath the skin. Once tethering is released, dermal fillers may be used selectively to support contour and volume in areas that remain depressed. This staged approach may reduce the amount of filler required and support more balanced improvement over time.
FAQs
Is subcision better than fillers for acne scars?
No treatment is universally better. Subcision is typically more appropriate for scars with underlying tethering, while fillers may be more suitable when volume loss is the main concern.
Do fillers replace subcision?
No. Fillers do not address fibrous tethering beneath the skin and are generally not used as substitutes for subcision in structurally anchored scars.
Are filler results permanent?
Most fillers used for acne scarring provide temporary results. Some longer-acting or collagen-stimulating fillers may last longer but still require periodic follow-up.
Which has more downtime?
Subcision is associated with short-term downtime due to expected bruising and swelling. Fillers generally involve minimal recovery time, although some post-procedure tenderness may occur.
