LYCOS RETRIEVER 
Headache: Cluster Headaches
built 254 days ago
Cluster headaches are a rare type primary headache, affecting 0.1% of the population. An estimated 85% of cluster headache sufferers are men. The average age of cluster headache sufferers is 28-30 years, although headaches may begin in childhood.
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This type of vascular headache is ... very rare, but when it comes, it is really painful. It commonly comes in groups or clusters, and can be very extremely severe. Normally aching around one eye or the temple, this vascular headache can last from fifteen minutes to several hours or even days! It can be caused by genetic problems, alcohol, and triggers such as Nitroglycerin and hydrocarbons.
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Approximately 75% to 90% of all persons who complain of chronic or frequent headaches suffer from tension headache. Tension headache is more prevalent among women than men. Cluster headaches primarily affect men between the ages of 20 and 40.
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Cluster headache ... is an episodic neural dysfunction but more likely involves areas in the hypothalamus. There is a marked increase in blood flow through the internal carotid artery on the headache side during the attack of pain.
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A cluster headache is one of the most painful types of headache. It's ... distinctive in ways other than the severity of the pain. A striking feature of cluster headache is that the attacks occur in cyclical patterns, or clusters — which gives the condition its name.
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Cluster Headaches