Eccrine hidradenitis, also known as idiopathic plantar hidradenitis, palmoplantar eccrine hidradenitis, and neutrophilic eccrine hidradenitis in children, is a localized, painful, nodular eruption on the soles (and less frequently the palms) with an abrupt onset leading to difficulty walking. Most diagnoses are in otherwise healthy children.

Eccrine hidradenitis has been associated with cold exposure and strenuous exercise as well as with no apparent precipitant. An identical eruption has been noted in the setting of Pseudomonas aeruginosa cutaneous infections (Pseudomonas hot-foot syndrome).