Erythromelalgia is a rare neurovascular disorder characterized by occasional episodes of intense painful burning, discoloration, and warmth in the extremities, particularly the hands and feet. The name “erythromelalgia” is originated from the Greek terms “erythros” meaning crimson, “melos” meaning limb, and “algos” meaning suffering. https://www.phlebotomytrainingtoday.com/what-is-erythromelalgia/