Deep acne scars, such as ice-pick and narrow boxcar scars, often do not respond well to resurfacing treatments alone. Acne scar treatments in Singapore include several approaches, and punch excision is one of the targeted methods used for deep, resistant scars.
Punch excision treatment is a minor surgical procedure that directly removes or reconstructs these scars to improve skin texture. This guide explains what punch excision involves, who may benefit from it, what recovery looks like, its risks and results, and how it compares with other acne scar treatments.
What is Punch Excision?
Punch excision is a minor surgical procedure used in the treatment of atrophic acne scars. Within the broader group of scar revision techniques, it sits alongside methods such as subcision and laser resurfacing. Unlike these broader resurfacing approaches, punch excision targets individual scars — especially those too deep or narrow to respond well to peels or lasers.
Doctors most often recommend punch excision for the below types of acne scars:
- Ice-pick scars – narrow, deep, V-shaped scars that extend into the dermis.
- Boxcar scars – sharply defined, U-shaped scars with steep edges.
By directly removing or reconstructing the scar, the procedure allows the skin to heal with a smoother surface.
Types of Punch Excision Techniques
Punch excision is not a single technique but a family of related approaches, each suited to different scar morphologies:
| Technique | Description | Best for | Closure Method |
|---|---|---|---|
| Punch Excision | Removes entire scar with a circular tool | Ice-pick, narrow boxcar scars | Sutures or adhesive |
| Punch Elevation | Removes base and elevates scar tissue flush with skin | Deep boxcar scars with intact walls | Sutures |
| Punch Grafting | Excised scar is replaced with a small skin graft (often from behind the ear) | Large or deep atrophic scars | Skin graft |
| Elliptical Excision | Removes scar in an oval shape | Wider boxcar scars | Sutures |
How Does Punch Excision Work?
Punch excision works by surgically removing scar tissue and allowing the skin to heal with smoother edges. It is performed as a minor dermatological procedure under local anaesthesia in a clinic setting. Unlike resurfacing treatments that target larger skin areas, punch excision focuses on individual scars, making it especially useful for deep ice-pick or narrow boxcar scars.
Step-by-Step Overview
| Step | What Happens | Purpose |
|---|---|---|
| 1. Preparation | The skin is cleansed and sterilised | Reduce infection risk |
| 2. Anaesthesia | Local anaesthetic is injected around the scar Ensure comfort. Because the procedure is done under local anaesthesia, you should not feel pain during the excision. Mild tenderness or discomfort may occur once the anaesthetic wears off, but this usually settles within a few days. | Ensure comfort during procedure |
| 3. Excision | The punch tool (1.5–3.5 mm) removes scar tissue, including epidermis and dermis | Eliminate fibrotic tissue |
| 4. Closure | The wound is closed with sutures, adhesive, or a graft | Promote smooth healing |
| 5. Dressing | A sterile dressing is applied | Protect wound during recovery |
| 6. Healing | Sutures are removed in 5–7 days; collagen continues to remodel | Improve skin texture over time |
Key Points
- Each scar is treated individually for precision.
- Several scars can usually be treated in a single session, although the exact number depends on scar type, size, and your tolerance for downtime.
- Closure method (sutures, adhesive, graft) depends on scar type and location.
- Collagen remodelling continues for months after treatment, supporting gradual improvement.
Who is Suitable for Punch Excision?
Punch excision is most appropriate for people with deep, well-defined acne scars that do not respond well to resurfacing treatments alone. Because it targets individual scars rather than broad skin areas, this procedure is especially effective for ice-pick scars and narrow boxcar scars.
Suitable Candidates
You may be a good candidate if you have:
- Ice-pick scars – narrow, deep, V-shaped scars extending into the dermis.
- Boxcar scars – U-shaped scars with sharp, defined edges.
- Discrete, individual scars rather than widespread textural changes.
- Controlled skin condition with no active acne at the time of treatment.
- Realistic expectations, understanding that scars can be improved but not fully erased.
Factors That Influence Suitability
Before recommending punch excision, doctors in Singapore consider several factors:
- Skin type – many patients locally have Fitzpatrick skin types III–VI, which carry a higher risk of post-inflammatory hyperpigmentation (PIH). Preventive measures such as sun protection and careful aftercare are especially important.
- Scar location – scars on the cheeks and temples often respond well, while scars in high-tension areas may be harder to close neatly.
- Medical history – conditions such as uncontrolled diabetes or the use of blood-thinning medication can affect wound healing.
- Treatment goals – punch excision is usually part of a staged or combination plan rather than a standalone solution.
Contraindications and Limitations
Punch excision is not suitable for everyone. Before recommending this procedure, your doctor will assess your skin condition, scar type, medical history, and ability to heal.
When Punch Excision May Not Be Recommended
- Active acne or skin infection – treating scars while acne is active may worsen inflammation and delay healing.
- History of keloid or hypertrophic scarring – higher risk of raised or enlarged scars after excision.
- Bleeding disorders or anticoagulant use – increased risk of bleeding and delayed healing.
- Uncontrolled medical conditions such as diabetes – can interfere with wound recovery.
- Photosensitising medication use or recent significant sunburn – increases risk of pigmentation changes.
- Pregnancy or breastfeeding – elective scar procedures are usually postponed.
Limitations of Punch Excision
- Not effective for rolling scars – better managed with subcision.
- Less suitable for widespread superficial scarring – fractional laser or microneedling may be more appropriate.
- Treatment may need to be staged – multiple sessions are sometimes required if you have many scars.
- Results vary between patients – scar depth can be improved, but complete scar removal is not possible with any treatment.
Benefits and Results of Punch Excision
Punch excision can be an effective method to improve the appearance of deep acne scars that do not respond well to resurfacing treatments. By directly removing or reconstructing scars, the procedure creates new wound edges that can heal more evenly and blend better with the surrounding skin.
Benefits of Punch Excision
- Direct scar removal – physically eliminates deep, resistant scars.
- Targeted approach – focuses on individual scars rather than treating the whole skin surface.
- Best suited for ice-pick and narrow boxcar scars – the scar types least responsive to resurfacing treatments.
- Can be part of a broader plan – often combined with subcision, laser resurfacing, or microneedling.
- Performed under local anaesthesia – safe and well tolerated in an outpatient setting.
Expected Results
- Shallower scars – treated scars usually appear less deep and less noticeable.
- Smoother texture – new wound edges tend to heal more evenly than the original scar tissue.
- Gradual improvement – collagen remodelling continues for several months after treatment.
- Measured progress – doctors may assess improvement using validated scar scales such as:
- Important to know – results vary between individuals, and complete scar removal is not possible with any treatment.
Recovery and Aftercare
Punch excision is a minor surgical procedure, but it still requires proper care after treatment to support healing and minimise side effects. Recovery usually takes about 5–7 days (around one week), depending on the number of scars treated and the closure method used.
Because Singapore has year-round high UV exposure and humid conditions, strict sun protection and good wound hygiene are particularly important to reduce pigmentation changes and infection risk.
Aftercare Instructions
To support recovery and reduce the risk of complications, you will usually be advised to:
- Cleanse gently – keep the treated area clean using a mild, non-irritating cleanser.
- Apply prescribed ointments or dressings as directed by your doctor.
- Avoid touching or picking at healing sites to prevent infection or new scarring.
- Use daily sunscreen to reduce the risk of post-inflammatory hyperpigmentation (PIH), especially under Singapore’s strong UV conditions.
- Pause strenuous activity or activities that cause heavy sweating until sutures are removed, as humidity may increase infection risk.
- Attend follow-up appointments for wound checks and suture removal if required.
Recovery Timeline
| Phase | What Happens | Care Tips |
|---|---|---|
| 1–3 days | Redness, swelling, small scabs | Gentle cleansing, apply ointment |
| 5–7 days | Sutures removed (if used) | Avoid picking, attend follow-up |
| 1–2 weeks | Skin begins to settle | Resume light activities, continue sun protection |
| 1–6 months | Ongoing collagen remodelling | Maintain skincare, monitor pigmentation |
Risks and Side Effects
Although punch excision, like all minor surgical procedures, has some risks, it is generally regarded as safe when carried out by a qualified doctor. Knowing what to anticipate and when to seek follow-up care is made easier when you are aware of the potential side effects.
Common Side Effects
Usually settle within days to weeks:
- Redness and swelling at the treated site.
- Mild discomfort or tenderness at the excision point.
- Small scabs or pinpoint marks during the initial healing process.
- Temporary skin colour changes, particularly in darker skin tones.
Less Common Risks
Occasionally, patients may experience:
- Infection if wound care is not followed correctly.
- Widened scars if closure tension is high.
- Suture marks if stitches do not heal cleanly.
- Trapdoor effect, where skin around the scar appears raised.
Rare Complications
Uncommon but possible:
- Hypertrophic or keloid scarring at the excision site.
- Persistent pigmentation changes such as prolonged post-inflammatory hyperpigmentation (PIH) or, rarely, hypopigmentation.
- Prolonged numbness or sensitivity, usually temporary but can persist in rare cases.
Quick Reference
| Type | Examples | Frequency |
|---|---|---|
| Common | Redness, swelling, mild discomfort, scabs | Days to weeks |
| Less Common | Infection, widened scars, suture marks, trapdoor effect | Occasional |
| Rare | Hypertrophic/keloid scars, persistent PIH or hypopigmentation, prolonged numbness | Rare |
Punch Excision vs Other Acne Scar Treatments
Punch excision is one of several methods available for acne scar revision. Each treatment works differently, and your doctor may recommend one or a combination depending on your scar type and overall treatment goals.
How Punch Excision Compares
- TCA CROSS – better for treating multiple fine ice-pick scars.
- Subcision – better for rolling scars caused by tethered bands under the skin.
- Laser resurfacing – better for improving overall skin texture and widespread superficial scarring.
Quick Reference Comparison
| Treatment | Best For | How It Works | Closure Needed? |
|---|---|---|---|
| Punch Excision | Ice-pick scars, narrow boxcar scars | Removes scar with punch tool | Yes (sutures, adhesive, or graft) |
| TCA CROSS | Multiple fine ice-pick scars | Chemical reconstruction with high-strength TCA | No |
| Subcision | Rolling scars | Releases fibrous bands under the skin | No |
| Laser Resurfacing | Widespread superficial scars, texture irregularities | Ablates/remodels upper skin layers, stimulates collagen | No |
Combination Treatments with Punch Excision
Punch excision is often performed as part of a combination treatment plan. While it removes or reconstructs individual deep scars, most patients have more than one scar type, and additional procedures may be required to improve overall skin texture. Combining treatments allows doctors to address different scar patterns in a single care plan.
Why Doctors Combine Treatments
- Different scars need different solutions – most patients have a mix of ice-pick, boxcar, and rolling scars.
- Staged improvements – some treatments work best when spaced out over weeks or months.
- Comprehensive outcomes – combining methods addresses both deep, isolated scars and overall texture.
Common Combination Approaches
| Combination | Role of Punch Excision | Role of Other Treatment |
|---|---|---|
| Excision + Laser Resurfacing | Removes deep, resistant scars | Smooths overall skin texture and blends treated areas |
| Excision + Subcision | Corrects sharp, vertical scars | Releases tethered rolling scars |
| Excision + RF Microneedling | Removes isolated scars | Stimulates deeper collagen remodelling |
| Excision + Dermal Fillers | Excises resistant scars | Restores lost volume under depressed scars |
| Excision + TCA CROSS | Excises select deep scars | Improves multiple fine ice-pick scars in surrounding skin |
Conclusion
Punch excision is a precise technique for treating deep, resistant acne scars such as ice-pick and narrow boxcar scars. By directly removing or reconstructing these scars, the procedure allows the skin to heal with smoother, more even edges.
For most patients, punch excision is part of a comprehensive treatment plan that may also include subcision, lasers, microneedling, or fillers to address different scar patterns. While results vary and complete scar removal is not possible, many patients notice meaningful improvement in the depth and appearance of their scars after recovery.
Punch excision is performed only by licensed doctors in Singapore such as Dr. Justin Boey in accordance with Ministry of Health (MOH) and Health Sciences Authority (HSA) guidelines. This ensures the procedure is carried out in a safe, sterile clinical setting with realistic expectations.
If you are considering treatment for acne scars, a consultation with a doctor will allow your scars, skin type, and medical history to be carefully assessed. From there, a tailored plan can be recommended to achieve safer and more effective results.
