Abstract
Seborrhoeic dermatitis (SD) is a chronic, relapsing, papulosquamous inflammatory itchy dermatoses. It manifests as erythematous papules, macules, or ill-defined flat plaques with varying levels of scaling and pruritus. The exact pathogenesis of this condition is not known but Malassezia yeasts, hormones (androgens), amount of sebum produced, and deranged immune response are known to play important roles in its development. There is a wide range of therapeutic options to treat SD but some patients do not respond to any of the treatments. Here, we report three patients with treatment-resistant facial SD, successfully treated with light-emitting diode light therapy (LED-LT).