Erythrokeratolysis hiemalis (EH) or keratolytic winter erythema (KWE) is an autosomal dominant skin disorder characterized by circles of erythema (redness or inflammation of the skin) and hyperkeratosis (excessive skin lesions in which there is overgrowth and thickening of the skin). With age, the symptoms grow milder, eventually disappearing all together. This disorder is mostly seen in South Africa, where the incidence is 1 in 7,000 people.