Are Frequent Headaches a Sign of Impending Stroke?

QUESTION: I get frequent headaches, as many as one or two a month. I am
worried that it may mean I will have a stroke. How can I be sure?
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ANSWER: Headaches are only one symptom of a stroke--the interruption of blood
supply to a part of the brain, or inflammation or rupture of a blood
vessel--but not all headaches mean that a stroke is coming on. Considering
the vast number of headaches in the United States in a given year versus the
number of strokes, the odds are pretty much against an occasional headache
being the first sign of an impending stroke. However, because headache CAN be
an important warning of a stroke, it is wise to be cautious about certain
types of headaches. Beware of any extremely severe headache--one far worse
than any other you ever had. Take note of a headache brought on by exertion,
a severe headache that lasts more than a day, one that gets gradually worse,
or any headache that is accompanied by reduced consciousness. If you notice
any neck stiffness or experience any changes in vision during the headache,
then it is time for fast action, with a quick call to your doctor, or a visit
to the nearest emergency room.