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International Classification of Headache Disorders: Wikis


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The International Classification of Headache Disorders (ICHD) is a detailed hierarchical classification of all headache-related disorders published by the International Headache Society.[1] It is considered the official classification of headaches by the World Health Organization, and, in 1992, was incorporated into the 10th edition of their International Classification of Diseases (ICD-10).[2] Each class of headache contains explicit diagnostic criteria—meaning that the criteria includes quantities rather than vague terms like several or usually—that are based on clinical and laboratory observations.[2]

The ICHD was first published in 1988 (now known as the ICHD-1). The second and current version, the ICHD-2, was published in 2004.




The primary headaches

ICHD 1, ICD10 G43: Migraine

Migraine without aura
Migraine with aura
Childhood periodic syndromes that are commonly precursors of migraine
Retinal migraine
Complications of migraine
Migraine-triggered seizure
Probable migraine

ICHD 2, ICD10 G44.2: Tension-type headache (TTH)

Infrequent episodic tension-type headache
Frequent episodic tension-type headache
Chronic tension-type headache
Probable tension-type headache

ICHD 3, ICD10 G44.0: Cluster headache and other trigeminal autonomic cephalagias

Cluster headache
Paroxysmal hemicrania
Short-lasting Unilateral Neuralgiform headache attacks with Conjunctival injection and Tearing (SUNCT)
Probable trigeminal autonomic cephalagia

ICHD 4, ICD10 G44.80: Other primary headaches

The secondary headaches

ICHD 5, ICD10 G44.88: Headache attributed to head and/or neck trauma

ICHD 6, ICD10 G44.81: Headache attributed to cranial or cervical vascular disorder

ICHD 7, ICD10 G44.82: Headache attributed to non-vascular intracranial disorder

ICHD 8, ICD10 G44.4 or G44.83: Headache attributed to a substance or its withdrawal

ICHD 9, ICD10 G44.821 or G44.881: Headache attributed to infection

ICHD 10, ICD10 G44.882: Headache attributed to disorder of homeostasis

ICHD 11, ICD10 G44.84: Headache or facial pain attributed to disorder of cranium, neck, eyes, ears, nose, sinuses, teeth, mouth or other facial or cranial structures

ICHD 12, ICD10 R51: Headache attributed to psychiatric disorder

Cranial neuralgias, central and primary facial pain and other headaches

ICHD 13, ICD10 G44.847, G44.848, or G44.85: Cranial neuralgias and central causes of facial pain

Trigeminal neuralgia
Glossopharyngeal neuralgia
Nervus intermedius neuralgia
Superior laryngeal neuralgia
Nasociliary neuralgia
Supraorbital neuralgia
Other terminal branch neuralgias
Occipital neuralgia
Neck-tongue syndrome
External compression headache
Cold-stimulus headache
Constant pain caused by compression, irritation or distortion of cranial nerves or upper cervical roots by structural lesions
Optic neuritis
Ocular diabetic neuropathy
Head or facial pain attributed to herpes zoster
Head or facial pain attributed to acute herpes zoster
Post-herpetic neuralgia
Tolosa-Hunt syndrome
Opthalamoplegic migraine
Central causes of facial pain
Anaesthesia dolorosa
Central post-stroke pain
Facial pain attributable to multiple sclerosis
Persistent idiopathic facial pain
Burning mouth syndrome
Other cranial neuralgia or other centrally mediated facial pain

ICHD 14, ICD10 R51: Other headache, cranial neuralgia, central or primary facial pain


  1. ^ Headache Classification Subcommittee of the International Headache Society (2004). "The International Classification of Headache Disorders, 2nd Edition". Cephalagia (Oxford, England, UK: Blackwell Publishing) 24 (Supplement 1). ISSN 0333-1024. Retrieved 4 September 2009. 
  2. ^ a b Olesen, Jes; Goadsby, Peter J.; Ramadan, Nabih M.; Tfelt-Hansen, Peter; Welch, K. Michael A. (2006). The Headaches (3rd ed.). Philadelphia, Pennsylvania, USA: Lippincott Williams & Wilkins. pp. 1-13. ISBN 0-7817-5400-3. 


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