[A rare headache syndrome. SUNCT syndrome, hemicrania continua and red ear syndrome].

Rare headache syndromes that are so fare not yet admitted to the classification system of the International Headache Society are the SUNCT syndrome (short-lasting, unilateral, neuralgiform headache attacks with conjunctival injection and tearing), the hemicrania continua and the red ear syndrome. The clinical characteristics, differential diagnoses and therapeutic strategies of these pathophysiologically unclarified diseases are presented with three casuistic reports.