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| Part I: the primary headaches | |
|
| (1) Migraine—with or without aura | |
| (2) Tension-type headaches | |
| (3) Cluster headache and other trigeminal autonomic cephalalgias | |
| (4) Other primary headaches | |
|
| Part II: the secondary headaches | |
|
| (1) Headache attributed to head and/or neck trauma such as domestic violence, MVA | |
| (2) Headache attributed to cranial or cervical vascular disorder—hypertension, subarachnoid haemorrhage | |
| (3) Headache attributed to nonvascular intracranial disorder—raised intracranial pressure, meningitis | |
| (4) Headache attributed to a substance or its withdrawal—illicit drug use such as cocaine, alcohol or medication overuse headache | |
| (5) Headache attributed to infections | |
| (6) Headache attributed to disorder of homeostasis—hypoglycaemia, hypoxia | |
| (7) Headache or facial pain attributed to disorder of cranium, neck, eyes, ears, nose, sinuses, teeth, mouth or other facial | |
| or cranial structures—trigeminal neuralgia, Bell’s palsy | |
| (8) Headache attributed to psychiatric disorder | |
|
| Part III: Cranial neuralgias central and primary facial pain and other headaches | |
|
| (1) Cranial neuralgias and central causes of facial pain | |
| (2) Other headache, cranial neuralgia, central or primary facial pain | |
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