Inverse psoriasis, a form of the dermatitis that affects skin folds, can present in infants as diaper rash. Typical findings are diffuse, light pink erythema that starts in groin folds; a dry appearance (in contrast to the wet-appearing maceration in candidiasis [see next image]); and the absence of satellite pustules. In 2% of persons affected by psoriasis, the dermatitis appears before the age of 2 years.
