CLUSTER HEADACHE CAUSES |
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Biochemical, hormonal, and vascular
changes induce cluster headaches, but why these changes occur
remains unclear. Episodic cluster headaches seem to be linked to
changes in day length, possibly signaling a connection to the so-called
biological clock. Alcohol, tobacco, histamine, or stress can trigger
cluster headaches. Decreased blood oxygen levels (hypoxemia) can
also act as a trigger, particularly during the night when an
individual is sleeping. Interestingly, the triggers do not cause
cluster headaches during remission periods.
The primary cluster headache symptom is excruciating one-sided head
pain centered behind an eye or near the temple. This pain may
radiate outward from the initial focus and encompass the mouth and
teeth. For this reason, some cluster headache sufferers may
mistakenly attribute their pain to a dental problem. Secondary
symptoms, occurring on the same side as the pain, include eye
tearing, nasal congestion followed by a runny nose, pupil
contraction, and facial drooping or flushing. |
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| CLUSTER HEADACHE RELATED ITEMS |
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