[Chilblains].

Chilblains represents an idiopathic vascular cutaneous benign acral syndrome. Epidemiology and basic mechanisms remain hypothetic and the treatment is controversial. The patients exhibit pruritic, redness painful, burning acral patches or plaques on the toes and/or fingers. The disease is bilateral, youthful and influenced by exposure to cold. Spontaneous healing is common when spring arrives and relapse is frequent on the following winters. There is no systemic symptom and laboratory studies are normal. The physical examination is sufficient for diagnosis. Histologic examination shows vascular and perivascular capillary and venular lymphocyte infiltrates without necrosis nor leukocytoclasia. The differential diagnosis includes: lupus, cold urticaria, acrocyanosis, erythermalgia, vasculitis and the Blue Toe Syndrome. Treatment includes prophylactic measures against cold and calcium channel inhibiting drug. In more severe cases thyrocalcitonin and hemodilution might be helpful.