Pigmentation issues — including melasma, sun spots, age spots, and post-inflammatory hyperpigmentation — are among the most common concerns in Southeast Asian beauty clinics. This guide provides a complete protocol for laser pigmentation removal that beauty professionals can follow to achieve consistent, safe results.
Understanding Pigmentation & Laser Physics
Laser pigmentation removal works on the principle of selective photothermolysis — the laser wavelength is selectively absorbed by melanin (the pigment) while sparing surrounding tissue. When the melanin absorbs the laser energy, it fragments into smaller particles that are then naturally eliminated by the body’s immune system.
Key wavelength considerations for Asian skin:
- 532nm (KTP/Frequency-doubled Nd:YAG): Targets superficial pigmentation (epidermal melasma, freckles, lentigines)
- 1064nm (Nd:YAG): Deeper penetration, safer for darker skin tones (Fitzpatrick III–V), targets dermal pigmentation
- 755nm (Alexandrite/Picosecond): Effective for stubborn pigmentation with fewer sessions; lower risk of post-inflammatory hyperpigmentation (PIH)
Pre-Treatment Protocol
- Client Assessment:
- Determine pigmentation type (epidermal vs. dermal vs. mixed) using Wood’s lamp examination
- Identify Fitzpatrick skin type — crucial for parameter selection
- Rule out contraindications: active infection, isotretinoin use, pregnancy, photosensitivity disorders
- Document with high-resolution photographs under consistent lighting
- Pre-Treatment Skincare (2–4 weeks prior):
- Discontinue retinoids, AHAs/BHAs 3–5 days before treatment
- Avoid sun exposure and tanning for minimum 4 weeks
- Begin daily SPF 50+ sunscreen application
- Optional: hydroquinone or tranexamic acid pre-conditioning for melasma patients
- Skin Preparation on Treatment Day:
- Thoroughly cleanse the skin — remove all makeup, sunscreen, and skincare products
- Apply topical anesthetic cream (lidocaine 5%) for 20–30 minutes; cover with plastic wrap
- Remove anesthetic and clean with saline or alcohol swab
Treatment Procedure
Step 1: Parameter Selection
| Skin Type | Starting Fluence | Spot Size | Pulse Width |
|---|---|---|---|
| Fitzpatrick I–II | 6–8 J/cm² | 2–4mm | Nanosecond/Picosecond |
| Fitzpatrick III–IV | 4–6 J/cm² | 4–6mm | Nanosecond/Picosecond |
| Fitzpatrick V–VI | 2–4 J/cm² | 6–8mm | Picosecond preferred |
Critical safety note for Asian skin: Always start conservatively. Lower fluence with larger spot size reduces the risk of PIH, which is significantly higher in Fitzpatrick III–V skin types.
Step 2: Test Patch
Before full treatment, perform a test patch on a small, inconspicuous pigmented area. Wait 48–72 hours to assess the skin’s response. Look for:
- Appropriate darkening of the pigment (indicating effective treatment)
- Mild erythema (expected)
- No blistering or excessive swelling (indicates over-treatment)
- No signs of PIH developing
Step 3: Treatment Delivery
- Apply a thin, even layer of cold gel (for Q-switched lasers) or ensure dry skin (for picosecond devices — follow manufacturer guidelines).
- Protect the client’s eyes with laser-specific safety goggles.
- Deliver laser pulses with slight overlap (approximately 10%) for even coverage.
- For spot-specific treatment (individual age spots), use smaller spot size with precise targeting.
- For full-face brightening, use larger spot size in a systematic grid pattern.
- The endpoint is immediate darkening of the pigmented lesion and mild surrounding erythema.
Step 4: Immediate Post-Treatment
- Apply cold compress or medical cooling mask for 15–20 minutes.
- Apply a thin layer of healing ointment (e.g., hyaluronic acid gel or centella asiatica cream).
- Apply broad-spectrum SPF 50+ sunscreen.
Post-Treatment Care
Days 1–3: Acute Recovery Phase
- Mild redness, swelling, and a warm sensation are normal
- Cleanse gently with lukewarm water only — no active skincare ingredients
- Apply medical-grade hydrating mask 1–2 times daily
- Do not pick, scratch, or rub the treated area
- Avoid direct sun exposure completely
Days 4–7: Crusting & Peeling Phase
- Treated pigment will darken further and form a light crust — this is normal
- Crusts will begin to naturally slough off around day 5–7
- Never force or pick at crusts — this causes scarring and PIH
- Continue gentle cleansing and liberal moisturizer application
- Begin gentle, non-foaming cleanser if skin tolerates
Weeks 2–4: Recovery & Maintenance
- Pigment should have noticeably lightened; new skin may appear pink
- Gradually resume normal skincare routine (avoid exfoliants for 2 weeks)
- Strict daily SPF 50+ sunscreen — reapply every 2–3 hours when outdoors
- Avoid heat-based treatments (sauna, steam) for 2 weeks
- Follow-up appointment at 4 weeks to assess results and plan next session
Treatment Frequency & Expected Results
- Epidermal pigmentation: 2–4 sessions, 4-week intervals
- Dermal/mixed pigmentation: 4–8 sessions, 4–6 week intervals
- Melasma: 6–10+ sessions, combined with topical therapy; expect gradual improvement
Disclaimer: This guide is intended for licensed beauty professionals only. Laser devices should only be operated by trained and certified practitioners. Always follow your specific device manufacturer’s instructions and local regulatory requirements.