Table 3 ICDH-II core diagnoses to be recognised at level 1 [13]

Primary headache disorders

 1.1 Migraine without aura

 1.2 Migraine with aura

 1.2.3 Typical aura without headache

 2.1 Infrequent episodic tension-type headache

 2.2 Frequent episodic tension-type headache

 2.3 Chronic tension-type headache

 3.1.1 Episodic cluster headache

 3.1.2 Chronic cluster headache

Secondary headache disorders

 5.2.1 Chronic post-traumatic headache attributed to moderate or severe head injury

 6.2.2 Headache attributed to subarachnoid haemorrhage

 6.4.1 Headache attributed to giant cell arteritis

 7.4.1 Headache attributed to increased intracranial pressure or hydrocephalus caused by neoplasm

 8.2 Medication-overuse headache (and subtypes)

 9.1 Headache attributed to intracranial infection

 10.3 Headache attributed to arterial hypertension

 11.3.1 Headache attributed to acute glaucoma

 13.1.1 Classical trigeminal neuralgia