(93 words, 45 seconds) A severe headache that is confined to one side of the head and recurs in epi...
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(93 words, 45 seconds) A severe headache that is confined to one side of the head and recurs in episodes or clusters over weeks or months is called a cluster headache. These headaches can be temporarily debilitating. Cluster headaches are much less common than other types of headaches. They run in families and are more common in men than women. They may be caused by an overactive hypothalamus, an area in the middle of the brain. Common triggers for cluster headaches include alcohol, stress, sleep apnea, and medications that widen blood vessels, such as nitroglycerin or histamines.