Subcision is a commonly used approach for managing tethered, atrophic acne scars, particularly rolling and boxcar scars. It targets the root cause of scar depressions by releasing fibrous strands that pull the skin downward. While this technique is effective on its own, its effects can be supported with dermal fillers, which help maintain the separation of the released tissue and support a more even skin texture.
Drawing on clinical experience from Dr Justin Boey, a Singapore-based medical doctor with a practice focus in aesthetic medicine, this article outlines when and why dermal fillers are considered after subcision. It also explores the types of fillers commonly used in local practice and factors that influence treatment planning from a medical perspective.
Understanding this combined approach may help individuals explore their options more confidently and have informed conversations with their healthcare provider.
Understanding Subcision and Its Role in Acne Scar Treatment
Subcision is a minimally invasive dermatological technique commonly used in the management of acne scars. It works by releasing fibrous bands that tether scars to underlying tissues, allowing the skin surface to elevate. This method is commonly considered for rolling and boxcar scars, which appear as wave-like or broad depressions.
What Subcision Does
- Releases scar tethers beneath the skin: During the procedure, a specialised needle or cannula severs fibrous bands beneath the skin, which can help scars lift and, in some cases, support collagen remodelling.
- Creates a pocket for healing or filler placement: The release creates a small space under the skin, where new tissue can form. When used in conjunction, it allows dermal fillers to support healing and structural improvement.
- Targets rolling and boxcar scars: Subcision is particularly relevant for scars that are depressed and tethered. It may not be suitable for ice pick scars, which are narrower and deeper.
Downtime and Initial Healing
Most individuals experience mild to moderate bruising and swelling after subcision. Here’s what to expect:
- Healing Timeline: Recovery usually takes 2 to 5 days, depending on the technique used and individual healing.
- Post-Treatment Care: Patients are advised to avoid vigorous physical activity, alcohol, and certain medications or supplements that may increase bleeding risk in the days following the procedure.
- Contraindications: Subcision is not suitable for individuals with active acne, keloidal tendencies, or certain blood disorders.
The Purpose of Dermal Filler Support After Subcision
Subcision creates space beneath the skin by releasing tethered scars. Dermal fillers complement this by providing temporary structural support, which can reduce the chance of scar reattachment and contribute to improved skin texture.
Preventing Re-tethering of Scar Tissue
After subcision, the body naturally attempts to heal the treated area. Without support, scar tissue may reattach and recreate the original indentation. Fillers help prevent this by occupying the space created during the procedure, giving the skin time to rebuild with healthier tissue.
Enhancing Skin Volume and Smoothness
Acne scarring can lead to loss of dermal volume, especially in areas with multiple scars. Fillers restore volume, smooth surface irregularities, improve contour, and elevate depressed areas.
In some cases, patients may notice visible changes soon after treatment, even if further improvements take time.
Stimulating Collagen Production
Certain fillers, particularly bio-stimulatory types, encourage the body’s natural collagen synthesis. This supports dermal repair and tissue regeneration, which may lead to progressive improvements even after the filler itself is absorbed.
The choice between structural and bio-stimulatory fillers depends on scar characteristics and treatment goals.
Timing of Filler Application After Subcision
Timing plays an important role in ensuring safe and effective results when combining dermal fillers with subcision. Applying fillers too early may interfere with healing, while waiting too long may allow partial re-tethering of scar tissue.
Immediate vs Delayed Filler Injections
Some clinics administer fillers immediately after subcision, especially when bruising is minimal and a blunt cannula is used. Others prefer to wait 1 to 4 weeks to allow:
- Bruising and swelling to subside
- Clearer visibility of any remaining depressions
- Reduced risk of injecting into inflamed areas
The timing decision is tailored to each individual’s healing progress and treatment plan.
Factors Influencing Timing
Several clinical considerations guide when fillers are introduced after subcision:
- Scar depth and type: Deeper, fibrous scars may respond better to staged treatments.
- Patient healing response: Individuals who bruise easily or recover slowly may benefit from a longer wait before filler application.
- Filler type: Hyaluronic acid (HA) fillers offer reversible effects and immediate volume, while bio-stimulatory fillers are often delayed to allow for stable tissue response before encouraging collagen production.
Ultimately, a tailored approach is essential, ensuring both safety and alignment with the patient’s goals.
Who Benefits Most from Filler Support After Subcision
Not every type of acne scar responds equally to subcision and filler treatment. A detailed consultation is essential to determine suitability and set appropriate expectations.
Scars that respond well to Filler with Subcision
- Rolling scars: These shallow, undulating scars respond best, as they are often caused by tethered fibres beneath the skin that can be effectively released and lifted with filler support.
- Boxcar scars: These may also improve, especially broader and shallower ones. Some may require a combination of treatments.
Patients with Volume Loss or Thinning Skin
In some individuals, acne scarring is accompanied by a general loss of mid-face volume or thinning skin:
- Mid-face hollowness can be improved with fillers that restore structural support and reduce shadowing caused by volume deficits.
- Atrophic post-inflammatory scarring and skin laxity may benefit from a bio-stimulatory filler to gradually rebuild dermal support.
- Patients with thin or fragile skin may require tailored techniques and softer filler formulations to achieve subtle changes.
Expected Results and Longevity
Understanding what to expect from subcision and filler treatments is important for realistic planning and long-term satisfaction.
Before and After: What Changes to Expect
While individual results vary, most people notice:
- A more even skin surface in areas previously affected by scars
- Shallower appearance of rolling scars
- Better contour in regions with mild volume loss
How Long Results Last
- Hyaluronic Acid (HA) fillers: Typically last 6 to 12 months, depending on product choice and treatment area.
- Bio-stimulatory fillers (such as Poly-L-Lactic Acid): Stimulate collagen over 12 to 24 months, providing a longer-term improvement in skin structure.
Results from subcision may be cumulative, with ongoing improvement over time as scar tissue remodels and filler support is maintained.
Maintenance and Follow-Up
Regular follow-ups allow the clinician to assess skin response and decide on top-up treatments or adjunctive procedures. Maintenance schedules vary, but most individuals return for review every 6 to 12 months, depending on the filler used and skin goals.
Recovery and Post-Treatment Care
Proper aftercare plays a significant role in achieving a smooth recovery and optimising outcomes from both subcision and filler treatments. Following clinical advice closely helps reduce downtime and supports the body’s natural healing process.
Post-Subcision Do’s and Don’ts
After subcision, the treated areas may feel tender and appear bruised or swollen. Here’s how to care for your skin:
Avoid applying pressure on the treated areas, including sleeping on the face or massaging the skin.
- Apply cold compresses during the first 24–48 hours to help minimise swelling and bruising.
- Do not use blood-thinning supplements or medications (unless prescribed) around the time of the procedure, as they may prolong bruising.
- Follow your clinician’s instructions precisely, including any recommendations on topical care or medication to prevent infection.
Aftercare for Fillers
Dermal filler care is generally straightforward but still requires a few precautions:
Avoid strenuous activity, alcohol, and saunas for at least 48 hours after treatment.
- Do not massage or apply pressure on the filler-treated areas unless directed by your practitioner.
- It’s normal to experience mild redness, tenderness, or swelling around the injection sites. These typically resolve within a few days.
- Contact your clinic promptly if you experience severe pain, unusual discolouration, or swelling that doesn’t improve.
Frequently Asked Questions (FAQ)
How do I know if I’m suitable for subcision and filler treatment?
Suitability is determined during a clinical consultation. Your scar type, skin thickness, and history of skin healing will be assessed before any treatment is recommended.
Can I combine subcision and fillers in the same session?
In some cases, yes. However, the decision depends on the degree of bruising, swelling, and the type of filler being used. Some individuals may benefit more from a staged approach.
Are these treatments suitable for darker skin tones?
Yes, but with caution. Treatment settings, filler types, and energy-based devices must be selected carefully to minimise the risk of pigmentation. Your clinician will take your skin tone into account during planning.
How many sessions will I need?
This depends on the severity of your scars, how your skin responds to each treatment, and whether you’re combining therapies. Most treatment plans span several months with scheduled reviews.
What’s the cost of acne scar treatment in Singapore?
Subcision starts from $400, while filler starts at $800/syringe. Your doctor will discuss costs during your consultation, taking into account the complexity of your case and the type of filler used.
Plan Your Next Step in Acne Scar Treatment
Effective acne scar management involves understanding the structure and depth of each scar, as well as choosing appropriate treatments based on clinical judgment and individual skin response.
Subcision is commonly used to release fibrous bands beneath the skin that cause surface indentations. In appropriate cases, this can be followed by dermal fillers, which provide structural support and help restore volume in areas affected by tissue loss.
At Sozo Clinic, these procedures are planned based on scar type, skin characteristics, and healing response. The timing and sequencing of subcision and filler use are guided by clinical evaluation to ensure each step aligns with the patient’s individual treatment goals.
If you’re considering treatment options, consulting a qualified practitioner can help you understand whether subcision and fillers are suitable for your scar type. An experienced medical team can assess your skin, explain the rationale behind each procedure, and recommend a treatment plan tailored to your needs.
