Atrophic acne scars are depressed scars formed when acne inflammation damages skin tissue and collagen is lost — the pimple heals, but the pit remains, troubling many people for life. Causes and types include: (1) Icepick scars — narrow, deep needle-like pits as if pierced by an ice pick, often on the cheeks and forehead. (2) Boxcar scars — broad, shallow pits with sharp edges, box-shaped, often on the cheeks. (3) Rolling scars — broad, wavy depressions with smooth edges, leaving undulating skin. The key to treating atrophic scars is stimulating collagen remodeling and regeneration — fractional lasers were previously standard with long recovery; now pico laser leads with ‘ultra-short pulses and photomechanical effects’: delivering laser energy in picoseconds (10 to the power of -12 seconds), precisely disrupting scar tissue and stimulating collagen regeneration — non-surgical, short recovery, progressive results. Rappoel Dermatology near Gangnam Station, Seoul, provides pico laser acne scar treatment.
Technical Principles of Pico Laser for Acne Scars
- Photomechanical effect (LIOB): The key of pico laser is the ‘ultra-short pulse’ — energy released in picoseconds creates a laser-induced optical breakdown (LIOB), shattering pigment and damaged tissue in the scar area into ultra-fine particles naturally metabolized by the body
- Collagen regeneration stimulation: The photomechanical effect simultaneously activates the skin’s repair mechanism — stimulating fibroblast activation and promoting new collagen and elastic fiber formation; depressions are ‘pushed up’ from the base, progressively smoothing the skin
- Fractional scanning: A microlens array divides the beam into hundreds of micro-spots — only part of the treatment area is heated while surrounding healthy tissue is preserved, greatly shortening recovery while achieving deep collagen stimulation
- Wavelength combinations: Pico laser can use different wavelengths (e.g., 532nm, 1064nm) — 1064nm penetrates deeper for deep scars and collagen stimulation; 532nm targets epidermal pigment, simultaneously improving scars and pigmentation
- Synergy with other treatments: Pico laser often combines with skin booster injections (HA, PN regeneration) — the laser stimulates collagen while injections supply nutrients, multiplying results; severe pits may combine subcision or fractional laser for reinforcement
Treatment Strategies for Different Scar Types
- Icepick scars: Narrow, deep needle-like pits. Strategy: pico laser as the base, optionally combined with subcision (needle release of scar fiber bands, allowing the depression to float up) — deep pits respond best to combination treatment
- Boxcar scars: Broad, shallow pits with sharp edges. Strategy: pico laser fractional mode plus skin booster (PN regeneration) afterward — stimulating collagen at the pit base while softening sharp edges
- Rolling scars: Broad wavy depressions. Strategy: combination of subcision + pico laser + skin booster — subcision first releases fiber bands, laser stimulates collagen, injection supplies nutrients; a three-pronged approach
- Scars with redness or pigmentation: Pits with post-inflammatory erythema (PIE) or dark marks (PIH). Strategy: pico laser with adjustable wavelengths simultaneously treating pigment and collagen — improving pits and pigmentation in one session
- Large pores with pits: Enlarged pores coexisting with mild scars. Strategy: pico laser fractional mode — simultaneously shrinking pores and stimulating collagen for finer overall skin texture
Rappoel Pico Laser Acne Scar Treatment Protocol
- Consultation assessment (5 min): Evaluate scar type (icepick/boxcar/rolling), depth, distribution, skin condition → confirm whether additional treatments are needed (subcision, injection) → design personalized plan
- Cleansing and anesthesia (10 min): Facial makeup removal → topical anesthetic cream for 15-20 minutes (pico laser pain is moderate; comfortable with anesthesia)
- Laser treatment (15-20 min): Adjust parameters per plan (wavelength, energy, fractional density) → full-face or localized scanning → mild redness and warmth at treated sites are normal
- Soothing and repair (10 min): Immediate soothing mask or cooling → repair ointment application → explain subsequent care
- Post-care instructions (3 min): Avoid washing with very hot water and rubbing on the day → strict sun protection for 1 week (sunscreen + hat) → avoid exfoliation, acid skincare, and beauty devices for 1 week → let crusts or peeling shed naturally, do not pick → 3-4 weeks between sessions, 3-5 sessions recommended for a full course
Pico laser acne scar treatment takes about 30 minutes with short recovery (1-3 days of redness and peeling); results accumulate progressively, with pits visibly shallowed and skin smoothed after a full course. Located 3 minutes from Gangnam Station Exit 10, with seamless English and Chinese consultation.
Frequently Asked Questions
What’s the difference between pico laser and fractional (Fraxel-type) laser for acne scars?
Different mechanisms and experiences: (1) Pico laser — ultra-short picosecond pulses create photomechanical effects with precise energy and minimal thermal damage to surrounding skin; short recovery (1-3 days of redness/peeling) and lower pain; excellent for mild-to-moderate pits, pigmentation, and large pores. (2) Fractional laser — primarily thermal, heating the dermis to stimulate collagen contraction and regeneration; stronger for deeper pits but longer recovery (3-7 days of crusting/peeling) and more noticeable pain. (3) Choice — mild-to-moderate pits favor pico laser (comfortable, fast recovery); deep pits may use fractional or a combination. (4) Rappoel recommends the most suitable laser or combination based on scar type and depth — most patients use pico laser as the base with additional treatments for severe areas.
How many pico laser sessions are needed to see results? How long do results last?
Sessions and results: (1) Timeline — each session triggers a metabolic and collagen-regeneration cycle, with visible improvement at 2-4 weeks; single-session improvement is limited (pits shallow about 10-20%); after a full course (3-5 sessions, 3-4 weeks apart), pits are visibly shallower and skin clearly smoother. (2) Duration — collagen regeneration accumulates progressively; results last 1-2 years after a full course (depending on individual skin and collagen loss rate). (3) Maintenance — 1-2 maintenance sessions per year, combined with skin booster (PN/HA) for reinforcement. (4) Note — atrophic scars cannot be 100% eliminated; the goal is ‘visibly shallower, visually smooth, unnoticeable after makeup’ — Rappoel honestly communicates achievable improvement during consultation.
Does pico laser for acne scars hurt? How long is recovery?
Pain and recovery: (1) Pain — treatment feels like rubber-band snapping stings; with topical anesthetic most patients complete it comfortably; a burning sensation follows, easing within 1-2 hours. (2) Post-treatment reactions — immediate redness (like sunburn) lasting about 1-3 days; some experience mild peeling or fine crusting, shedding naturally in 5-7 days — a normal collagen-regeneration process; do not pick. (3) Recovery — most patients can return to normal makeup and social activity in 1-3 days (with sun protection); the crusting period lasts about one week. (4) Compared with fractional laser — pico recovery is significantly shorter with lower pain, making it the ‘comfortable’ scar treatment. (5) Rappoel provides soothing repair and detailed care guidance for smooth recovery.
Can pico laser simultaneously improve scars and post-acne pigmentation?
Yes — one of pico laser’s advantages: (1) Dual mechanism — the photomechanical effect simultaneously addresses ‘pigment’ and ‘collagen’: pigment particles are shattered and metabolized (improving PIE redness and PIH dark marks), while collagen is stimulated to regenerate (improving depressions). (2) Wavelength selection — 532nm targets epidermal pigment (redness, dark marks); 1064nm penetrates deeper (deep scars and collagen stimulation) — Rappoel selects or combines wavelengths based on scar and pigment status. (3) Results — one session simultaneously improves ‘pits + pigment + pores’ for overall skin quality. (4) Note — dark marks need multiple sessions for visible fading, and strict sun protection is required after treatment to prevent pigment rebound — Rappoel emphasizes sun protection repeatedly.
Who is not suitable for pico laser? What should be noted before and after?
Unsuitable groups and notes: (1) Unsuitable — pregnancy and breastfeeding; photosensitive diseases (e.g., lupus); recent photosensitizing medications (e.g., isotretinoin — physician evaluation after discontinuation); active skin infection or open wounds; keloid-prone individuals need careful evaluation. (2) Before — avoid exfoliation, acid skincare, laser, or hair removal for 1 week; arrive with a bare face. (3) After — strict sun protection for 1 week (sunscreen + hat); avoid high-temperature environments (sauna, jjimjilbang), intense exercise sweating, alcohol, and spicy food; let crusts shed naturally, do not pick; avoid makeup for 1 week (or use mineral powder). (4) Rappoel performs skin evaluation and history review before treatment to confirm suitability.
Pitted acne scars makeup can’t hide? Rappoel pico laser — non-surgical smoothing for refined skin!
📍 77, Seocho-daero, Seocho-gu, Seoul, South Korea
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