The triangular crusty nose: a clinical clue for pemphigus in the context of mask wearing

Abstract

Since the onset of the COVID-19 pandemic, there has been a widespread adoption of mask wearing. With prolonged use of facial masks, an increasing number of new-onset inflammatory facial dermatoses have been observed, along with flaring of pre-existing dermatoses. Common dermatoses triggered by facial mask wearing include contact dermatitis, maskne (a subtype of mechanical acne) and mask-induced rosacea. In this report, we present two cases of pemphigus vulgaris, presenting first with a well-defined triangular crusty nose induced by mask wearing during the COVID pandemic.