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Cluster headaches are excruciating attacks of pain in one side of the head, often felt behind the eye.
Our Health A-Z contains more information on Cluster headache.
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A migraine is usually a moderate or severe headache felt as a throbbing pain on one side of the head.
Our Health A-Z contains more information on Migraine.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.