PFB (Pseudofolliculitis Barbae, i.e. ingrown hairs, razor bumps or beard bumps) is an irritating condition that is commonly caused by shaving. It often appears in patients of darker skin types, including tanned skin and skin types IV through VI.
The laser selectively targets the melanin in the underlying hair and follicle, as well as hyperpigmentation surrounding the lesion. Due to the unique 650-microsecond pulse duration being 50 to 500 times shorter than pulses durations typically used for hair removal by other laser technologies, the energy passes through the skin quickly and does not overheat the epidermal melanin to effectively treat the condition.