Infectious pseudochromhidrosis in the setting of dupilumab use

Chromhidrosis (or true chromhidrosis) and pseudochromhidrosis are rare conditions of colored sweat.1 In chromhidrosis, colored sweat is secreted from apocrine or eccrine sweat glands.1 However, in pseudochromhidrosis, sweat becomes colored after secretion by exogenous factors such as dyes, paints, chemicals, or pigment-producing microorganisms, such as chromogenic bacteria.2 When the color is due to chromogenic microorganisms, the condition is referred to as infectious pseudochromhidrosis (IPCH; Table I).