Cluster headaches usually occur repeatedly on one side of your head and cause intense pain that feels like a stabbing sensation in your eye.
Find out what causes different types of abdominal pain.
Most headaches aren't caused by a serious illness, but some could be a sign of a life-threatening condition.
Tests and diagnosis
MRI uses a magnetic field and radio waves to create detailed images of the organs and tissues within your body.
June 26, 2013
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