Cluster headache runs in bouts separated by remissions, so it does not simply worsen year on year. Most people keep that episodic pattern. A minority move to a chronic form in which the remissions shorten or disappear, and that shift is the change worth watching for.
Cluster headache runs in bouts separated by remissions, so it does not simply worsen year on year. Most people keep that episodic pattern. A minority move to a chronic form in which the remissions shorten or disappear, and that shift is the change worth watching for.
Attacks are strictly one-sided, centred around or behind the eye or the temple, extremely severe, and short by headache standards. They come with autonomic features on the same side: a watering or red eye, a drooping lid, a blocked or running nostril, facial sweating. Unlike migraine, which drives people to lie still in the dark, cluster headache produces restlessness and pacing. Attacks group into bouts lasting weeks to months, often recurring at similar times of year and at similar times within the day, then remit.
Chronic cluster headache is defined by bouts continuing for a year or more without a remission of at least three months. Most people with cluster headache remain episodic, and some move between the two forms over their lifetime. Smoking is strongly associated with cluster headache, and continuing to smoke is associated with a less favourable course. The pattern over years is not predictable at the outset, which is a reason to keep a record rather than to assume either outcome.
Acute treatment has to work in minutes, not hours. High-flow oxygen through a non-rebreather mask aborts attacks for many people and is well tolerated. Injected or nasal triptans act quickly; oral tablets are usually too slow for an attack this short. Preventive treatment is started at the beginning of a bout to shorten it, with verapamil the most established option and a short transitional course sometimes used while it takes effect. Doses and schedules are set individually and are not appropriate to publish.
For a condition this cyclical, timing is the information that changes management. Note when each bout starts and ends, how many attacks a day, the time of day they occur, how long each lasts, and what aborted them. That record establishes whether the pattern is episodic or chronic, shows whether preventive treatment shortened the bout, and lets treatment be started earlier in the next one. First presentations are usually imaged to exclude a structural cause, and MRI is arranged at an imaging centre.
Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.
Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.
Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.
Sources and further reading: MedlinePlus: cluster headache; MedlinePlus: headache; National Institute of Neurological Disorders and Stroke.
Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.