Erythromelalgia is a rare neurovascular disorder characterized by occasional episodes of intense painful burning, discoloration, and increased temperature in the limbs, particularly the feet and hands. The name “erythromelalgia” is derived from the Greek phrases “erythros” meaning red, “melos” meaning limb, and “algos” meaning discomfort. https://www.phlebotomytrainingtoday.com/what-is-erythromelalgia/