WHAT THE "H"?
'(<a href="http://www.j-archive.com/media/2008-10-24_J_02.wmv">Kelly of the Clue Crew shows a brainy animation on the monitor.</a>)  When cerebral arteries become <a href="http://www.j-archive.com/media/2008-10-24_J_02.jpg" target="_blank">dilated</a>, it can often lead to this vascular pain also known as cephalalgia'
a headache