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
|4.5||Hypnic headache ||G44.80
|Previously used terms||
Hypnic headache syndrome, "alarm clock" headache
Attacks of dull headache that always awaken the patient from asleep.
- Dull headache fulfilling criteria B-D
- Develops only during sleep, and awakens patient
- At least two of the following characteristics:
- occurs >15 times per month
- lasts ≥15 minutes after waking
- first occurs after age of 50 years
- No autonomic symptoms and no more than one of nausea, photophobia or phonophobia
- Not attributed to another disorder1
- Intracranial disorders must be excluded. Distinction from one of the trigeminal autonomic cephalalgias is necessary for effective management.
The pain of hypnic headache is usually mild to moderate, but severe pain is reported by approximately 20% of patients. Pain is bilateral in about two-thirds of cases. The attack usually lasts from 15 to 180 minutes, but longer durations have been described.
Caffeine and lithium have been effective treatments in several reported cases.
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