It is estimated that about 1 % to 2% of patients that comes to the emergency department suffers from headaches not related to trauma. Headache occurs when there are underlying problem. It can be a minor or a life threatening headache (Sheehy’s, 2010).
There are two types of headaches. Primary headache can be categorize as migraine, tension-type headache (TTH), cluster headache and other trigeminal autonomic cephalgias and other primary headache (Brashers, 2006). It occurs when the cerebral vasculature, cranial nerves, cervical nerves and musculature are irritated. Vascular changes occur by stimulation of trigeminal ganglion causes the release of substance P and calcitonin. The release of substance P causes degranulation of mast