* Not a rare disease
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 A cluster headache usually begins suddenly with excruciating pain on one side of the head, often behind or around one eye. In some individuals, it may be preceded by a migraine-like "aura." The pain usually peaks over the next 5 to 10 minutes, and then continues at that intensity for up to an hour or two before going away. Cluster headaches generally begin between the ages of 20 and 50, although the syndrome can also start in childhood or late in life. Males are much more likely than females to develop cluster headaches.Cluster headaches are a form of headache notable for their extreme pain and their pattern of occurring in "clusters", usually at the same time(s) of the day for several weeks.
Last updated: 5/1/2008
- Luc Jasmin. Cluster headaches. MedlinePlus. November 2, 2012; http://www.nlm.nih.gov/medlineplus/ency/article/000786.htm. Accessed 11/1/2013.
- Headache: Hope Through Research. National Institute of Neurological Disorders and Stroke (NINDS). July 2, 2013; http://www.ninds.nih.gov/disorders/headache/detail_headache.htm. Accessed 11/1/2013.
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- The Online Mendelian Inheritance in Man (OMIM) is an catalog of human genes and genetic disorders. Each entry has a summary of related medical articles. It is meant for health care professionals and researchers. OMIM is maintained by Johns Hopkins University School of Medicine.
- PubMed is a searchable database of medical literature and lists journal articles that discuss Cluster headache. Click on the link to view a sample search on this topic.