The process of destroying hair follicles through light absorption is called selective photothermolysis:

  • Photo = Light

  • Thermo = Heat

  • Lysis = Destruction

Selective photothermolysis means that the laser selectively heats the hair follicle (rich in melanin) without damaging the surrounding skin tissue. This is achieved by using the right wavelength for the target and the right pulse duration to focus the energy on the hair follicle while allowing the surrounding skin to cool down​(Motus AY User Manual '22).

Learning Tip: Think of selective photothermolysis like a precision laser tool that heats and destroys only the unwanted hair while protecting the rest of the skin.

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