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Erythromelalgia, also known as Mitchell's disease (after Silas Weir Mitchell) and red neuralgia, is a rare disorder in which blood vessels, usually in the extremeties and especially in the feet, dilate, causing a painful burning and throbbing sensation and red skin. The attacks come and go, and tend to be worse in summer.
Erythromelalgia is often associated with vascular diseases such as polycythaemia vera or with heavy metal poisoning.