What should you know about trigeminal cluster headaches?

Cluster headache is a neurological condition in which attacks arrive in repeated bouts, often at similar times of day. Pain is usually around or behind one eye or at the temple, and may spread across one side of the face. The trigeminal nerve carries pain signals from the face and head; its activation helps explain the intense pain. The same attack can trigger watering or redness of the eye, a blocked or runny nostril, facial sweating, or a drooping eyelid on the painful side.

Attacks often begin abruptly and can make a person feel restless rather than still. The pattern differs from migraine, although nausea or sensitivity to light can occur. A clinician uses the timing, location, associated eye or nose changes, examination findings, and medical history to distinguish cluster headache from other causes of severe head or facial pain.

Arrange a medical assessment if these attacks are new, recurring, or becoming harder to control. Keep a brief record of when each attack starts, how long it lasts, which side hurts, eye or nose symptoms, possible triggers, and any medicine already taken. This helps the clinician recognise a pattern and choose an appropriate plan.

Treatment may involve fast-acting medicine for an attack and a separate preventive treatment during a cluster period. Some options require a prescription, a particular delivery method, or supervision because they are not suitable for everyone. Avoid starting oxygen or changing prescription medicines without clinical guidance. Alcohol can trigger attacks during an active bout for some people, so mention any clear pattern to your clinician.

Seek emergency help for a sudden, extremely severe headache; new weakness, numbness, confusion, fainting, trouble speaking, or a seizure; fever with a stiff neck; or severe headache after a head injury. Urgent assessment is also needed for a painful red eye with vision changes, or a new headache during pregnancy or soon after giving birth.

Contact a clinician promptly when a first severe one-sided headache has not been assessed, the pattern changes, attacks become more frequent, or usual treatment stops helping. Cluster-like symptoms can resemble other conditions, so the diagnosis should be checked rather than assumed from the pain location alone.

Ask: Could this pattern be cluster headache or another type of headache? Which treatment should I use at the start of an attack? Do I need a preventive plan while attacks are recurring? Are there medicines or health conditions that affect my treatment choices? What symptoms should prompt emergency care?