Introduction: Why Acne Scars Are More Than Skin Deep
For millions of people worldwide, acne scars are not just a cosmetic issue. They can affect confidence, social interactions, and even career opportunities. While many treatments promise smoother skin — from creams to lasers — few methods directly address the root cause of depressed acne scars: fibrotic bands beneath the skin.
This is where acne scar subcision stands out. By releasing the fibrous strands tethering scars downward, subcision helps scars rise closer to the skin’s surface while triggering natural collagen remodeling. In this comprehensive guide, we’ll explore everything you need to know about subcision, from techniques and effectiveness to risks, recovery, and whether it’s the right choice for your scar type.
What Are Acne Scars and Why Do They Form?
Acne scars form when inflamed pimples or cystic acne damage the skin’s deeper layers. As the skin attempts to heal, it produces collagen fibers — sometimes too little, sometimes too much, and often in a disorganized way.
There are several types of acne scars:
- Rolling scars: broad depressions with sloping edges, often caused by fibrous tissue pulling the skin downward.
- Boxcar scars: round or oval depressions with sharp edges.
- Ice-pick scars: narrow, deep scars that look like puncture marks.
- Hypertrophic and keloid scars: raised scars from excess collagen.
👉 Subcision is most effective for rolling and boxcar scars, since both are caused by fibrous bands. Ice-pick scars usually require TCA CROSS or laser resurfacing instead.
What Is Subcision for Acne Scars?
Subcision, short for subcutaneous incision-less surgery, is a minor surgical technique introduced in 1995 by dermatologists Orentreich & Orentreich in New York.
How It Works:
- A specialized needle or cannula is inserted under the scar.
- The tool is moved in a fanning motion to break fibrotic strands that tether the skin down.
- The released scar is lifted upward.
- The controlled injury stimulates new collagen production, gradually filling in the depression.
This dual action — mechanical release + biological remodeling — makes subcision one of the few treatments that directly address the structural cause of acne scars.
Types of Subcision Techniques
Not all subcision methods are the same. The choice of instrument and approach affects recovery, safety, and results.
1. Traditional Needle Subcision
- Tools: 18G, 21G, or 23G hypodermic needles.
- Pros: Accessible, inexpensive.
- Cons: Higher bruising, swelling, limited precision.
2. Nokor Needle Subcision
- Tool: 18G Nokor needle with a sharp blade tip.
- Pros: Strong cutting power for tough fibrous tissue.
- Cons: More pain, bruising, and risk of damage.
3. Blunt Cannula Subcision (Gold Standard)
- Tool: Blunt cannulas (18G–25G) of varying lengths.
- Pros:
- Safer (reduced risk of vessel damage).
- Can release scars in multiple directions.
- Less bruising and downtime.
- Allows delivery of fillers or regenerative serums.
- Cons: Requires more skill from the doctor.
4. Micro-Subcision
- Tool: Fine-tuned needles or cannulas for precise scar release.
- Used for targeted scars or sensitive areas.
5. CO₂ Subcision (Carboxytherapy)
- Uses gas injection to break scar tissue.
- Clinical studies show weaker results compared to microneedling or blunt cannula subcision.
Blunt Cannula Subcision: Why It’s Superior
Among all techniques, blunt cannula subcision with the multilayer approach has emerged as the gold standard.
Key Advantages:
- Multilayer precision: targets fibrotic bands at different skin depths.
- Fewer side effects: less bruising and vascular damage.
- Combination ready: can be paired with PRP, Rejuran, dermal fillers, or lasers for better outcomes.
- Durability: once scars are released and collagen is rebuilt, results are long-lasting.
At BAC Clinic in Bangkok, cannulas ranging from 12G to 30G are available, allowing physicians to customize treatment for each scar type.
How Many Sessions Are Needed?
The number of subcision sessions depends on scar severity, skin type, and whether combination treatments are used.
- Traditional needle subcision: 5–8 sessions.
- Blunt cannula subcision: usually 2–4 sessions for visible results.
- Combination with microneedling RF or lasers: fewer sessions needed, but greater improvement.
Recovery After Subcision
Downtime is relatively short compared to ablative resurfacing treatments.
What to Expect:
- Mild swelling & bruising: 2–10 days depending on area treated.
- Tiny needle marks: heal within days.
- Tenderness: common but temporary.
- Gradual improvement: collagen remodeling continues for 3–6 months post-treatment.
Subcision vs. Other Acne Scar Treatments
It’s important to compare subcision with other popular methods:
| Treatment | Best For | Sessions* | Downtime* | Effectiveness |
|---|---|---|---|---|
| Subcision | Rolling, boxcar scars | 2–5 | 2–10 days | Moderate–High |
| Microneedling Fractional RF (e.g.,Infini) | All types of acne scars (especially deep, stubborn scars), Skin Tightening, and Wrinkle Reduction. | 3–5 | 1–5 days | Moderate–High, often delivering better results than single treatments due to volumetric heating. |
| Laser Resurfacing (Pico, CO₂, Er:YAG) | Texture, pigmentation | 3–5 | 5–14 days | Moderate |
| TCA CROSS | Ice-pick scars | 3–6 | 3–7 days | High for narrow scars |
| Dermal Fillers | Temporary volume loss | 1 | 0–2 days | Immediate but temporary |
👉 Best results often come from combination therapy. For example, subcision + Infini RF + fillers gives more complete improvement than any single method.
*Varies depending on the severity of the condition and individual response.
Clinical Evidence Supporting Subcision
Research shows subcision provides significant scar depth reduction in rolling and boxcar scars.
- Orentreich’s 1995 study: first documented success with tethered scars.
- Moftha et al. study (32 patients): microneedling performed better than CO₂ subcision.
- Recent trials: blunt cannula subcision combined with fillers leads to faster recovery and higher patient satisfaction.
Patient Experience: What to Expect Step by Step
- Consultation: Scar analysis (rolling vs. boxcar vs. ice-pick).
- Anesthesia: topical cream or local injection.
- Subcision procedure: cannula inserted, fibrous bands released.
- Optional combination: fillers, PRP, or Rejuran injected.
- Aftercare: cold compress, antibiotics/anti-bruising gel if needed.
- Follow-up: assessment after 4–6 weeks, further sessions if required.
Risks and Side Effects
While generally safe, subcision is still a minor surgery. Possible side effects include:
- Bruising and swelling (most common).
- Temporary lumps or irregularities.
- Rare: infection, vessel injury, or pigmentation changes.
👉 Choosing an experienced dermatologist significantly reduces risks.
Cost of Acne Scar Subcision
The price varies depending on clinic, doctor expertise, tools used, and whether combination treatments are included.
- General range (Thailand): 500–2,900 THB per session.
- With fillers/lasers: higher costs, but better results.
- Longevity: results last permanently if acne is controlled.
Who Is a Good Candidate for Subcision?
Subcision may be right for you if:
- You have rolling or boxcar scars.
- You are healthy with no active acne or infections.
- You understand results are significant but not 100% scar removal.
- You’re willing to undergo multiple sessions for best results.
Why Choose BAC Clinic for Subcision in Bangkok?
At BAC Clinic, subcision is performed using a multilayer blunt cannula approach combined with modern technologies like Infini RF Microneedling, Picosecond lasers, and Rejuran S injections.
Key strengths:
- Customized tools (12G–30G cannulas).
- Combination protocols for maximum scar remodeling.
- Experienced dermatologists specializing in scar revision.
- Affordable treatment packages with transparent pricing.
📞 Consultation available at 020-033-365
📲 Line: @bacclinic
Frequently Asked Questions (FAQ)
1. Does subcision hurt?
Mild discomfort may be felt, but local anesthesia ensures minimal pain.
2. How soon will I see results?
Some improvement is visible after the first session. Collagen remodeling continues for 3–6 months, so results get better over time.
3. Can scars come back?
Released scars generally do not re-tether. However, new acne breakouts can cause new scars — so controlling acne is essential.
4. Can subcision be combined with lasers?
Yes. In fact, subcision + laser resurfacing + RF microneedling is one of the most effective protocols for stubborn scars.
5. Is one treatment enough?
Usually not. 2–4 sessions are needed for optimal improvement.
Final Thoughts
Acne scar subcision is a powerful treatment that addresses the underlying cause of rolling and boxcar scars. While no single treatment guarantees 100% scar removal, subcision — especially with blunt cannula multilayer technique — offers some of the most dramatic and lasting results available today.
For the best outcome, always consult with a qualified dermatologist, choose a clinic experienced in scar revision, and consider combination therapy.
Because clear, confident skin is not just about looks — it’s about restoring your self-esteem.
