Why are they called cluster headaches?

Why are they called cluster headaches?

Cluster headaches get their name from how they affect you. They come on in clusters, or groups, before temporarily going away for most people.

Each headache tends to last 30 to 45 minutes, though some are shorter and some longer. You may experience up to eight of these headaches within 24 hours. And this may happen for weeks or several months.

Then the clusters usually pause, for reasons that aren’t yet understood. The headaches go into remission (go away) for months or years before returning. Some people never get much of a break, though. They experience chronic (ongoing) cluster headaches. This happens to about one in five people who get cluster headaches.