Advanced Scar Treatment — From Lasers to Microneedling

Last updated: 5 March 2026

Scars — whether from acne, surgery, trauma, or burns — can have a profound impact on self-confidence and quality of life. Advances in aesthetic technology have significantly expanded the treatment options available, moving far beyond the limitations of topical creams and basic dermabrasion. Modern scar revision now encompasses a sophisticated toolkit of laser technologies, microneedling systems, injectable treatments, and combination protocols that can produce remarkable improvements in scar appearance. At Axiom Aesthetics, our practitioners are experienced in assessing scars and developing personalised treatment plans using the latest evidence-based approaches.

Understanding Scar Formation

Scars form when the dermis is damaged and the body repairs the wound with collagen fibres that are structurally different from normal skin. As described by Wolfram et al. (2009) in Clinics in Plastic Surgery, scar tissue is characterised by parallel rather than random collagen fibre arrangement, reduced elastin content, absence of hair follicles and sweat glands, and altered vascularity. The type and severity of scar depends on the depth and nature of injury, genetic factors, anatomical location, and the body’s inflammatory response during healing.

Types of Scars

• Atrophic scars — depressed below the skin surface; the most common type from acne (icepick, boxcar, and rolling subtypes)
• Hypertrophic scars — raised, red scars that remain within the boundaries of the original wound
• Keloid scars — raised scars that extend beyond the original wound boundaries; more common in Fitzpatrick skin types IV-VI
• Contracture scars — tight, restrictive scars typically resulting from burns
• Stretch marks (striae) — a form of scarring caused by rapid skin stretching

Laser Scar Treatment

Ablative Fractional Lasers

Fractional CO2 and erbium:YAG lasers create microscopic columns of thermal damage in the skin, triggering an intense wound-healing response that remodels scar tissue. The fractional approach — treating a fraction of the skin surface per session — allows rapid healing from the surrounding untreated tissue bridges. A systematic review by Cho et al. (2018) in Journal of the American Academy of Dermatology found that fractional CO2 laser produced an average improvement of 50-70% in acne scar severity scores.

Non-Ablative Fractional Lasers

Non-ablative fractional lasers (such as 1540nm and 1550nm erbium:glass) create thermal zones of injury within the dermis without disrupting the surface epidermis. This results in shorter recovery time compared to ablative lasers, though typically more sessions are needed. Published evidence shows 40-50% improvement in atrophic scars with a course of 3-5 treatments.

Pulsed Dye Laser (PDL)

PDL targets haemoglobin in blood vessels, making it effective for reducing the redness associated with immature scars, hypertrophic scars, and keloids. Research by Alster and Handrick (2000) demonstrated that early PDL treatment of surgical scars produced significantly better cosmetic outcomes compared to untreated controls.

Microneedling for Scar Treatment

Microneedling creates controlled micro-injuries using fine needles (0.5-3.0mm depth), stimulating collagen and elastin production through the wound-healing cascade. The technique is particularly effective for atrophic acne scars, with a landmark study by Alam et al. (2014) in JAMA Dermatology demonstrating significant improvement in acne scar severity after three monthly microneedling sessions.

Radiofrequency Microneedling

Combining microneedling with radiofrequency energy delivery significantly enhances the collagen-remodelling response. Insulated needle tips deliver RF energy at precise depths within the dermis, producing controlled thermal zones that stimulate robust neocollagenesis. Clinical trials have shown improvements of 50-75% in atrophic acne scars following a course of 3-4 RF microneedling treatments.

Injectable Scar Treatments

• Dermal fillers — hyaluronic acid fillers can immediately improve the appearance of rolling and boxcar atrophic scars by elevating the depressed tissue
• Corticosteroid injections — intralesional triamcinolone acetonide is the first-line treatment for hypertrophic scars and keloids, reducing inflammation and flattening raised tissue
• 5-Fluorouracil (5-FU) — an antimetabolite that inhibits fibroblast proliferation; used alone or in combination with corticosteroids for resistant hypertrophic scars and keloids
• PRP (Platelet-Rich Plasma) — growth factor-rich plasma that can enhance healing when combined with microneedling for scar treatment

Chemical Peels for Scarring

TCA CROSS (Chemical Reconstruction of Skin Scars) is a targeted peel technique where high-concentration TCA (70-100%) is applied precisely to the base of individual icepick and narrow boxcar scars using a sharp wooden applicator. This induces focal collagen remodelling that gradually raises the scar base to the level of surrounding skin. Studies show 60-80% improvement after a course of 3-6 treatments spaced 4-6 weeks apart.

Combination Approaches

The best scar treatment outcomes typically result from combining modalities. A published algorithm by Fabbrocini et al. (2010) in the Journal of the European Academy of Dermatology and Venereology recommends combining TCA CROSS for icepick scars, subcision for tethered rolling scars, fractional laser for overall texture improvement, and fillers or PRP for volume-deficient scars.

Frequently Asked Questions

Can scars be completely removed?

Complete scar removal is not possible with current technology. However, modern treatments can typically achieve 50-80% improvement, making scars far less noticeable. Multiple sessions and combination approaches produce the best outcomes.

How soon after scarring can treatment begin?

For surgical and traumatic scars, initial treatments can begin once the wound has fully closed (2-4 weeks). More intensive treatments are usually initiated after 3-6 months. Acne scars can be treated once active acne is controlled.

Which treatment is best for acne scars?

It depends on the scar type: TCA CROSS for icepick scars, fractional laser and RF microneedling for boxcar scars, and subcision with fillers for rolling scars. A combination approach produces the most comprehensive improvement.

How many scar treatment sessions are typically needed?

Most protocols involve 3-6 sessions spaced 4-8 weeks apart. Improvement is progressive, with results continuing to develop for several months after the final session as collagen remodelling continues.