Energy-based devices — fractional CO₂, erbium, picosecond, alexandrite, Nd:YAG, KTP, PDL, IPL. The chromophore framework and what each actually does.
Acne scar treatment in darker skin (Fitzpatrick IV-VI) requires modalities that minimize PIH. RF microneedling and subcision are safest; fractional CO2 carries higher…
CO2 lasers penetrate deeper with more collagen contraction — stronger results, longer recovery, higher PIH risk. Er:YAG ablates precisely with less heat — faster…
Halo, Moxi, and Fraxel are fractional lasers from Sciton and Solta Medical. Here is how their wavelengths, depths, downtime, and clinical evidence compare — and which…
IPL and BBL HEROic both use broadband light for pigment and redness, but differ in energy delivery, speed, and FDA clearance. How they compare, who is a candidate, and…
Laser resurfacing in Black skin requires matching wavelength and energy to melanin-rich tissue. Non-ablative 1540/1550 nm and 1064 nm Nd:YAG are safest; ablative CO2…
Lasers can worsen melasma in darker skin via rebound hyperpigmentation and melanocyte activation. Low-fluence QS Nd:YAG toning helps but carries risks. Evidence on safe…
Ultherapy is the only device FDA-cleared to lift. Thermage tightens. RF microneedling remodels texture. Lasers smooth surface. None repositions tissue like a surgical…
Vbeam (595 nm PDL) and Excel V (532/1064 nm KTP/Nd:YAG) are the dominant vascular laser platforms. How they compare on mechanism, evidence, comfort, purpura risk, and…
PicoSure (755 nm) and PicoWay (532/1064/785 nm) are the dominant picosecond laser platforms. The choice depends on ink color, skin type, and whether the target is…
PIH is the most common pigment complication after lasers, peels, microneedling, and injectables in skin of color. What the evidence says about prevention, early…