What is a Cluster Headache and How is It Different from a Migraine?

Cluster headaches are severe, one-sided headaches that occur in cyclical patterns or clusters. They affect about 1 in 1,000 people and cause excruciating pain around or behind one eye, lasting 15 minutes to 3 hours. Compared with migraine attacks, cluster headache attacks usually last less time and often cause extremely severe stabbing or burning pain around one eye. They may occur at a similar time each day and often cause restlessness or pacing. Some people also experience nausea or sensitivity to light or sound. Cluster headaches may also cause symptoms such as a drooping eyelid, a smaller pupil, tearing, or nasal congestion on the affected side. Consult a healthcare provider for an accurate diagnosis and treatment. Seek urgent medical care for a sudden or first severe headache, or a headache with weakness, confusion, fever, vision loss, or a new drooping eyelid or unequal pupils.

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