Abstract: Recent years studies showed that phototherapy had a favourable effect in treatment of androgenetic alopecia. Low-level laser with the wavelength of 650~785 nm, fractional non-ablative laser with the wavelength of 1550 nm and 1927 nm as well as the ablative fractional CO2 laser are effective in the treatment of androgenic alopecia. Among them, the therapeutic evidence of 655 nm laser is the most sufficient for androgenetic alopecia. The application of low-level laser and high-level fractional laser of different wavelengths in the treatment of androgenetic alopecia is reviewed in this paper.

Key words: androgenetic alopecia, low-level laser, fractional laser