Called a cluster headache"The cluster headache period may last from a few weeks to a few months, and then they go away. The cluster periods often recur at the same time of year in subsequent years," notes Drexler. These headaches may not come back for several months or even for several years. "The cluster headache is very distinctive. It is always on the same side, usually centering on the eye. The pain is described as sharp or stabbing, and is of excruciating intensity, lasting from 15 minutes to 2 hours, and averaging 45 minutes,The cause of cluster headaches is not completely understood, but the hypothalamus appears to be involved in their development," says Drexler. The hypothalamus is the part of the brain that controls sleeping and waking cycles. Understanding Cluster Headaches
Cluster headaches are very severe headaches that can occur every day for weeks or months at a time. Pain relief. Once a cluster of headaches has started, pain medications are not very effective because they take too long to work. "Cluster headaches are treated symptomatically with the same types of medications that are used for migraine, One example is Imitrex (sumatriptan), a migraine medication approved by the U.S. Food and Drug Administration for cluster headache and most effective as an injection or nasal spray.
Other treatments. At the onset of a headache, inhalation of 100 percent oxygen can be effective. Some people also get relief from the application of the topical anesthetic lidocaine inside the nose.
http://www.everydayhealth.com/headache-m… Hope this helps
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