More IHS Resources
The International Headache Society (IHS) is the world's membership organisation for all whose professional commitment, whatever their discipline, is to helping people whose lives are affected by headache disorders.Visit the IHS website
||Chronic cluster headache
Cluster headache attacks occurring for more than 1 year without remission or with remissions lasting less than 1 month.
- Attacks fulfilling criteria A-E for 3.1 Cluster headache
- Attacks recur over >1 year without remission periods or with remission periods lasting <1 month
Chronic cluster headache may arise de novo (previously referred to as primary chronic cluster headache) or evolve from the episodic subtype (previously referred to as secondary chronic cluster headache). Some patients may switch from chronic to episodic cluster headache.
Consult the Sitemap to learn more about the structure of the classification and its main chapters.
IHS vs. ICD-10
To facilitate headache diagnosis in daily practice, the classification provides the corresponding WHO ICD-10NA codes for each IHS code.
The Classification Subcommittee prepares and revises the International Classification of Headache Disorders.
The International Classification of Headache Disorders, 3rd edition, beta version
Extend your electronic library with important IHS publications. All documents may be downloaded free of charge.
Cephalalgia is the official journal of the IHS. It contains original papers on all aspects of headache. The journal provides an international forum for original research papers, review articles and short communications.http://cep.sagepub.com/
IHS Discussion Group
Ask questions and share information about the 2nd edition of
the Headache Classification in one of our peer-to-peer
To the Discussion Group