Flexural and intertriginous psoriasis

**Definition:** Psoriasis involving flexures (retro-auricular folds, axillae, crural folds) and/or intertriginous areas (groins, under the breasts and, in obese individuals, abdominal apron fold). It may occur on its own or in association with seborrhoeic psoriasis or chronic plaque psoriasis. Plaques are thin, shiny and beef-red in colour with minimal scale. They may become secondarily fissured and/or macerated.