Secondary erythromelalgia

A rare neurologic disease characterized by intermittent pain, erythema, swelling, and heat of the extremities which is aggravated by warming and improved by cooling. Attacks can last between minutes and days and tend to be precipitated by heat, exercise, or physical dependence. The disease may be linked to a variety of underlying conditions including hematological, metabolic, connective tissue or neurological disorders, neoplasia, infections, and certain drug side effects, among others.