Mayo Clinic Minute: ‘Tis the season for cluster headaches. A cluster headache is a rare headache disorder that differs from a typical migraine or headache. Less than 1% of the population have cluster headaches, but for those people, it's an intense experience because the headaches come on fast and hit hard. "Then (there is) 15 to 20 minutes of this pain, which is so severe that patients often cannot sit still. They have to get up, pace around, maybe push on the head or bang things against the he