“…As to location, inner canthus, supraorbital and frontal region 3,8,9,15,22 and it may reach the orbit 9 , infraorbital region and temporal-zygomatic region 8,22 , both unilateral 3 and bilateral, when it forms the fourfinger syndrome, in an allusion to the position taken by the victims of these symptoms 8,22 . Other regions such as the vertex and the nape are also quoted 22 . The painful episodes normally last some hours 3,8 , with frequency varying from daily 9, 22 to weekly or rare 15 .The presentation may be related with level of nasal mucosa congestion, influenced by the position of the patient by the action of gravity 3,8,11,24 , and also by external stimuli, such as climatic affections 10 .…”