Chronic paroxysmal hemicrania (CPH), which also causes short headache attacks, but mostly in women.

Chronic paroxysmal hemicrania and episodic paroxysmal hemicrania are variants of cluster headaches.

Chronic paroxysmal hemicrania (CPH), also known as Sjaastad syndrome, is a severe debilitating unilateral headache, usually affecting the area around the eye.

Chronic paroxysmal hemicrania (CPH) is a condition similar to cluster headache, but CPH responds well to treatment with the anti-inflammatory drug indomethacin and the attacks are much shorter, often lasting only seconds.

Included in the differential diagnosis of a new onset nighttime headaches in the elderly is drug withdrawal, temporal arteritis, Sleep apnea, oxygen desaturated, Pheochromocytoma, intracranial causes, primary and secondary neoplasms, communicating hydrocephalus, subdural hematoma, vascular lesions, migraines, cluster headaches, chronic paroxysmal hemicrania and hypnic headache.

Chronic paroxysmal hemicrania (CPH), also known as Sjaastad syndrome, is a severe debilitating unilateral headache, usually affecting the area around the eye.