Table 4.

Headache temporal patterns.

Acute Headache	Recurrent Acute Headache
Upper respiratory tract infections with or without fever	Migraine Tension headache
Acute sinusitis	Cluster headache
Pharyngitis	Hypertension
Viral or bacterial meningitis	Hyperhyroidism
Migraine (first episode)	Pheocromocytoma
Drug abuse	Drugs
Poisoning
Medications (steroids, oral contraceptives)
Ventricular-peritoneal shunt malfunction
Brain tumor
Subarachnoid haemorrhage
Intracranic haemorrhage
Hydrocephalus
Venous sinuses thrombosis
Chronic progressive headache	Non progressive chronic headache
Brain tumor	Chronic migraine
Communicating or obstructive hydrocephalus	Tension-type headache
Pseudotumor cerebri	Cluster headache
Cerebral abscess Subdural chronic hematoma
Aneurysms and vascular malformations Drugs
Poisoning
Daily persistent new onset headache
Primary acute headache and chronic headache association