Home Introduction Prefaces Introduction to the classification How to Use This Classification Subcommittees and working groups The Classification Table of contents Part I: The primary headaches Part II: The secondary headaches Part III: Cranial neuralgias, facial pain and other headaches Appendix Definition of Terms

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

A1. MigraineA2. Tension-type headacheA3. Cluster headache and other trigeminal autonomic cephalalgiasA6. Headache attributed to cranial or cervical vascular disorderA7. Headache attributed to non-vascular intracranial disorderA8. Headache attributed to a substance or its withdrawalA9. Headache attributed to infectionA9.1. Headache attributed to intracranial infection [G00-G09]A9.1.6. Headache attributed to space-occupying intracranial infectious lesion or infestationA9.1.7. Headache attributed to intracranial parasitic infestationA9.4. Chronic post-infection headache [code to specify aetiology]BibliographyA10. Headache attributed to disorder of homoeostasisA11. Headache or facial pain attributed to disorder of cranium, neck, eyes, ears, nose, sinuses, teeth, mouth or other facial or cranial structuresA12. Headache attributed to psychiatric disorderA13. Cranial neuralgias and central causes of facial pain

Comment:

There are space-occupying intracranial infectious lesions causing headache other than brain abscess or subdural empyema. Since the pathophysiology is miscellaneous and the systematic studies to classify these headaches are inadequate, tentative diagnostic criteria are given here in the appendix.

Diagnostic criteria:

Headache with at least one of the following characteristics and fulfilling criteria C and D:
1. diffuse continuous pain
2. aggravated by straining
3. accompanied by nausea and/or focal neurological symptoms and/or signs
Evidence of a space-occupying intracranial infectious lesion or infestation from neuroimaging and/or laboratory investigations
Headache develops during the space-occupying intracranial infection or infestation
Headache resolves within 3 months¹ after successful treatment of the lesion

Note:

Headache usually resolves within 1 month.

Comments:

A direct space-occupying effect leading to raised intracranial pressure and/or irritation of the meningeal or arterial structures are the mechanisms for causing headache of this subtype.

The most common organisms causing space occupying granulomatous or cystic central nervous system diseases are mycobacteria, fungi (eg, Cryptococcus neoformans and others), Toxoplasma gondii, free living amoebae, cestodes (eg, Cysticercus cellulosae, Coenurus cerebralis, Sparganum species), nematodes (eg, Toxocara canis, lymphatic filariae, Onchocerca volvulus, Anisakis species) and trematodes (eg, Schistosoma species, in particular Schistosoma japonicum, and Paragonimus species).

Sitemap

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.

IHS Subcommittee

The Classification Subcommittee prepares and revises the International Classification of Headache Disorders.

Downloads

Extend your electronic library with important IHS publications. All documents may be downloaded free of charge.

Cephalalgia

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 forums. To the Discussion Group

ICHD-II Full Text Search