Keratolytic winter erythema is a rare epidermal disease, characterized by recurrent centrifugal palmoplantar peeling and erythema presenting seasonal variation (cold weather). Skin lesions may spread to the dorsum of hands and feet and to the interdigital spaces. Lower legs, knees and thighs may also be involved. Episodes may be preceded by itch and hyperhidrosis. Skin biopsy reveals an epidermal spongiosis with clefting in the stratum corneum, followed by regrowth. Keratolytic winter erythema follows an autosomal dominant mode of transmission. The disease is Monarch Disease Ontology entry MONDO_0007854 (keratolytic winter erythema). Also known as: Erythrokeratolysis hiemalis, Oudtshoorn disease.