Abstract: Compared with Q-switched lasers, picosecond lasers has shorter pulse（10-12s) and higher energy, which causes less damage to the adjacent tissues and is more effective. However, picosecond lasers have been used in China just for a few years. The application of picosecond lasers in the skin pigmentary diseases is reviewed.

Key words: picosecond lasers, pigmentary disorders, Q-switch laser