“…In the past decade, several lasers with wavelengths strongly absorbed by melanin and nanosecond pulse durations have been shown to treat pigmented lesions effectively and quickly. These include the Q-switched (QS) neodymium:yttrium-aluminumgarnet (Nd:YAG) laser, 3,4 QS ruby laser (QSRL), 5 and QS alexandrite laser (QSAL). 6,7 However, certain side effects, especially postinflammatory hyperpigmentation (PIH), are common in Asian people after laser therapy.…”