👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Physiological Adaptation🔖 Free to read, print, and share
Also known as: histamine headache · suicide headache
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Use this quick-reference guide to spot, treat, and prevent Cluster Headache on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
🩺 Signs
Excruciating unilateral eye/temple pain
Ipsilateral tearing, nasal congestion
Ptosis + miosis (Horner's)
Restless, paces (vs migraine)
📌 Pattern
Clusters, same time daily
Often wakes at night
🧪 Meds
Acute: 100% O2 via mask
Abortive: triptans (sumatriptan SQ)
Prophylaxis: verapamil
📚 Cluster Headache — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Cluster headaches are excruciating, unilateral headaches centered around or behind one eye that occur in 'clusters' (repeated daily attacks over weeks to months) separated by remission periods. They are accompanied by autonomic signs on the same side such as tearing, nasal congestion, eyelid drooping, and facial sweating. Attacks are short (15 minutes to 3 hours), often wake the patient at night, and tend to occur at the same time each day. They are more common in men.
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Key points
Understand these first
Severe, sharp, unilateral periorbital pain that occurs in clusters of daily attacks lasting 15 minutes to 3 hours, often at the same time each day or night.
Ipsilateral autonomic features: lacrimation (tearing), nasal congestion/rhinorrhea, ptosis, miosis, conjunctival redness, and facial sweating on the affected side.
During attacks patients are typically restless and pace, unlike migraine sufferers who prefer to lie still.
Acute treatment: 100 percent oxygen by nonrebreather mask and subcutaneous or intranasal sumatriptan.
Alcohol, nicotine, and strong odors are common triggers during a cluster period and should be avoided.
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Nursing priorities
What to do, in order
Administer high-flow 100 percent oxygen via nonrebreather mask at attack onset as ordered.
Give prescribed subcutaneous or intranasal triptan promptly for acute relief.
Provide a calm environment and allow the patient to move or pace, as restlessness is common.
Assess and document attack timing, duration, frequency, and triggers.
Administer preventive medications (verapamil, corticosteroids) as ordered during cluster periods.
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Red flags — report now
Escalate immediately
Chest pain or signs of cardiac ischemia after triptan administration — hold the medication and notify the provider.
A new headache pattern, headache with neurologic deficits, or 'worst-ever' sudden headache that does not fit the usual cluster pattern.
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Patient teaching
What patients must know
Avoid alcohol, nicotine, and strong odors entirely during a cluster period, as they can trigger attacks.
Use 100 percent oxygen and prescribed abortive medication at the first sign of an attack.
Take preventive medication consistently during cluster cycles even when feeling well.
Keep a headache log noting timing and triggers to guide treatment.
Maintain a regular sleep schedule, since attacks often occur during sleep or at predictable times.
❓ Cluster Headache: NCLEX FAQs
What are the priority nursing interventions for Cluster Headache?
Administer high-flow 100 percent oxygen via nonrebreather mask at attack onset as ordered. Give prescribed subcutaneous or intranasal triptan promptly for acute relief. Provide a calm environment and allow the patient to move or pace, as restlessness is common. Assess and document attack timing, duration, frequency, and triggers.
What are the warning signs of Cluster Headache a nurse must report?
Chest pain or signs of cardiac ischemia after triptan administration — hold the medication and notify the provider. A new headache pattern, headache with neurologic deficits, or 'worst-ever' sudden headache that does not fit the usual cluster pattern.
What do I need to know about Cluster Headache for the NCLEX?
Severe, sharp, unilateral periorbital pain that occurs in clusters of daily attacks lasting 15 minutes to 3 hours, often at the same time each day or night. Ipsilateral autonomic features: lacrimation (tearing), nasal congestion/rhinorrhea, ptosis, miosis, conjunctival redness, and facial sweating on the affected side. During attacks patients are typically restless and pace, unlike migraine sufferers who prefer to lie still. Acute treatment: 100 percent oxygen by nonrebreather mask and subcutaneous or intranasal sumatriptan.
What patient teaching is important for Cluster Headache?
Avoid alcohol, nicotine, and strong odors entirely during a cluster period, as they can trigger attacks. Use 100 percent oxygen and prescribed abortive medication at the first sign of an attack. Take preventive medication consistently during cluster cycles even when feeling well. Keep a headache log noting timing and triggers to guide treatment.
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Quick Tip
Severe, sharp, unilateral periorbital pain that occurs in clusters of daily attacks lasting 15 minutes to 3 hours, often at the same time each day or night.