[Erythromelalgia: two case reports and literature review].

Erythromelalgia is a rare disease of unclear etiology characterized by recurrent erythema, burning pain and warmth of the affected extremities. In this paper we reported 2 cases of primary familial erythromelalgia and difficulties with achieving a significant improvement with the currently available treatment. Moreover, this paper provides a brief update on pathophysiology, prognosis and treatment of erythromelalgia.