Normally acute headache is associated with an acute disease, i.e. loca
l or systemic inflammation, intracranial bleeding, acute glaucoma and
so on. Diagnosis is urgent and the management aims both to cure the ca
usal process and to relieve the symptomatic pain. In chronic headache
other etiological and pathogenetical conditions habe to be considered.
Often chronic pain emerges and persists or recurs episodically for mo
nths or years without identificable organic cause. Thus acute and chro
nic headache need different diagnostic procedures and management.