TL;DR: Device choice depends on four variables: target problem (pigment/vessel/tissue/fat/hair), target depth (epidermis / upper dermis / deep dermis / SMAS / fat), skin type (Fitzpatrick I–VI), and downtime tolerance.
Decision matrix — by problem
Pigment
| Problem | First | Alternative |
|---|---|---|
| Solar lentigo | Q-switch Nd:YAG / Alexandrite | IPL/BBL |
| Melasma | Low-dose Q-switch + topical | Thulium 1927 + topical |
| Post-inflammatory hyperpigmentation | Topical + light Q-switch | Mesotherapy + glutathione |
| Nevus of Ota | Q-switch 1064 | Picosecond |
| Tattoo (black/blue) | Q-switch 1064 / Picosecond | — |
| Red tattoo | 532 KTP / picosecond | — |
Vascular / redness
| Problem | First | Alternative |
|---|---|---|
| Facial telangiectasia | 532 KTP / PDL | IPL/BBL |
| Rosacea | PDL / BBL | KTP |
| Port-wine stain | PDL | Picosecond |
| Lip venous lake | Nd:YAG 1064 | — |
Tissue / collagen
| Problem | First | Alternative |
|---|---|---|
| Superficial fine lines | Erbium:YAG fractional | 1550 nm non-ablative |
| Deep atrophic acne scars | Fractional CO2 | RF microneedle |
| Stria | Fractional non-ablative | RF microneedle |
| Mild sagging (mid-face) | Multipolar RF + HIFU | Threads + RF |
| Marked sagging (neck) | HIFU | LIFU / surgery |
Fat / contour
| Problem | First | Alternative |
|---|---|---|
| Double chin | Injection lipolysis | LIFU / cryolipolysis |
| Abdominal fat | LIFU / cryolipolysis | Injection lipolysis |
| Cellulite | RF + acoustic shockwave | Mesotherapy + RF |
Hair removal
| Skin type | Recommended | Avoid |
|---|---|---|
| Fitzpatrick I–III | Alexandrite 755 nm | — |
| Fitzpatrick IV | Diode 810 / 940 | High-power Alex |
| Fitzpatrick V–VI | Nd:YAG 1064 only | Alex / IPL |
Ten common wrong matches
- Alexandrite on dark skin — burn + hypopigmentation. Use Nd:YAG 1064.
- High-dose laser on active melasma — flares. Low-dose + topical is first line.
- Isotretinoin and ablative laser — wait 6 months.
- Hair removal over solar keratosis — diagnosis missed. See dermatology first.
- Laser on vitiligo — Köbner flare.
- IPL during pregnancy/breastfeeding — defer.
- Single HIFU with no follow-up plan — limited result.
- Skin tightening instead of fat reduction — wrong tool for sagging.
- Deep fractional CO2 on keloid-prone patient — abnormal scarring risk.
- Pigment laser on freshly-tanned skin — paradoxical pigmentation.
Fitzpatrick-specific safety
- Types I–III: most laser wavelengths reasonably safe. Sun protection discipline still required.
- Type IV: Alex at moderate energy; Diode preferred; Nd:YAG always safe. Cooling mandatory.
- Types V–VI: Nd:YAG 1064 only, or picosecond. Avoid IPL and Alex. Low-dose start + test patch.
Pre-consultation checklist
- Fitzpatrick skin type (clinician assesses)
- Sun exposure in last 4 weeks
- Medications in last 6 months (especially isotretinoin, anticoagulants, photosensitizers)
- Active skin disease (herpes, acne, vitiligo, melasma flare)
- Prior skin surgery / keloid history
- Pregnancy / breastfeeding
- Prior laser / IPL experience and adverse events
- Expectations — sessions and timeline
- Device brand / model — ask to see the box
Questions to ask the clinic
- Which device brand and model? CE/FDA-approved?
- Recommended session count and interval?
- Expected outcome + alternative method?
- Downtime / recovery?
- How are side effects managed?
- Test session available?
- Is touch-up included? (No medical procedure can guarantee an outcome — beware of clinics that promise.)
- Will a certified physician operate the device?
After-treatment do's and don'ts
Do: Daily SPF50+; cold compresses first 24–48 h; gentle skincare; hydrate; antioxidants. Don't: Direct sun 24–72 h; hot showers / sauna 48 h; intense exercise 48 h; pick crusts; new retinoid / AHA without clinic clearance.
Seasonal planning (Türkiye climate)
| Season | Recommended | Avoid |
|---|---|---|
| Winter | Ablative laser, Q-switch pigment, Thulium | — |
| Spring | RF, HIFU, mesotherapy | Ablative Erbium/CO2 |
| Summer | RF, HIFU, BBL (controlled), Nd:YAG hair removal | Q-switch pigment, ablative laser |
| Autumn | All | — |
FAQ
RF or HIFU — which is better? Different targets. HIFU is SMAS-focused; strong for sagging. RF targets dermal collagen; ideal for moderate firming. Best annual plan includes both.
IPL hair removal then switch to laser? Yes — wait 4–6 weeks. The clinic will pick the laser appropriate to your skin type.
Combined sessions? Some combinations (RF + LED, HIFU + filler) are safe and preferred. Others (same-session ablative + Q-switch) are not.
Does laser cause cancer? Clinical data does not support this. Optical lasers don't ionize DNA the way UV does.
Acne medication + laser? Isotretinoin: 6-month ablative laser delay. Doxycycline / topical retinoid: usually fine; physician decides.
Conclusion
"Which device?" is the wrong question. The right one: "For my skin type, this problem, which energy and what depth?" — answered jointly by physician and patient.
Dr. Murat Toktamısoglu, MD, PhD — Ataşehir, Istanbul. WhatsApp: +90 533 356 2480. Last medical review: May 18, 2026.
