A ClusterHead's Life - Weblog by a Canadian sufferer.
Meta Description: [ A blog about my struggle with chronic cluster headaches, epilepsy, and how they affect my life. ]

Cluster Headache - Concise listing of clinical features and management.

Cluster Headache - Consumer health resource center providing information on the causes, symptoms, and treatment. From eMedicine Health.
Meta Description: [ Cluster headache is far less common than migraine headache or tension headache. Cluster headaches begin far more dramatically, however, and remain quite unique in their course over time. As the ... ]

Cluster Headache FAQ - Frequently Asked Questions from the Michigan Head Pain And Neurological Institute.
Meta Description: [ Michigan Head-Pain & Neurological Institute (MHNI) is the nation's first comprehensive headache and migraine treatment and research center. MHNI has established a broad range of therapeutic, diagnostic, and educational services for patients who attend the institute. In addition to medical care, n... ]

Cluster Headaches - Further research into the possible elimination of chronic, severe and life altering headache pain, cluster headaches, through the use of hallucinogenic substances, which have proven to be more effective and less destructive to the human body, than traditional treatments.
Meta Description: [ Researching treatments of cluster headaches and migraine pain through the use of psychedelic substances which may be more effective and less destructive to the human body than traditional treatments. ]

Cluster Headaches Worldwide Support Group - Includes forum and cat room; medical articles and FAQs.
Meta Description: [ Cluster headaches and those that suffer, join the cluster headaches worldwide support group! This site is devoted completely and exclusively to those that suffer from Cluster Headaches ]

eMedicine Health - Cluster Headache FAQs - Consumer health resource with FAQs relating to these headaches characterized by short-lived attacks of sudden, severe pain around one of the eyes.
Meta Description: [ Acute angle-closure glaucoma is caused by a rapid or sudden increase in pressure inside the eye, called intraocular pressure (IOP). In angle-closure glaucoma, the iris (the colored part of the ... ]

Organization for Understanding Cluster Headaches - Information about OUCH and its activities. Includes a quiz, medical information, comparison table and the International Headache Society diagnostic criteria.

OUCH (UK) - Charity and expert patient group dedicated to helping cluster headache sufferers in the UK. Find support and membership details.