Erythromelalgia is a rare neurovascular condition characterized by periodic episodes of intense burning pain, discoloration, and heat in the extremities, particularly the hands and feet. The name “erythromelalgia” is derived from the Greek words “erythros” meaning crimson, “melos” meaning appendage, and “algos” meaning discomfort. https://www.phlebotomytrainingtoday.com/what-is-erythromelalgia/