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| Headaches Sensitivity |
Cluster headaches are rarer, and their cause is unknown. They occur far more often in men than in women. They consist of intense pain behind or around one eye. Unlike migraines, there is no nausea or light sensitivity associated with cluster headaches. These headaches occur in cluster of one to four a day for weeks or months at a time (thus the name) then disappear completely for months or years.
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