Pain/discomfort arising from pain-sensitive structures in the head.

Postdural puncture headache (PDPH)

Major complication of neuraxial anesthesia that can occur following spinal anesthesia and with inadvertent dural puncture during epidural anesthesia.

Idiopathic intracranial hypertension (IIH)

Idiopathic intracranial hypertension (IIH), or pseudotumor cerebri, formerly called benign intracranial hypertension, is a condition with raised intracranial pressure (ICP) in the absence of identifiable cause.

Cluster headache

Cluster headache or suicide headache is an excruciating, strictly one-sided pain syndrome with attacks that last between 15-180 minutes and that are accompanied by marked ipsilateral cranial autonomic symptoms, such as lacrimation and conjunctival injection.