Introduction to chronic (migraine) headaches

This article is part of a series - Migraine Headaches

Introduction to chronic (migraine) headaches
Treatment information for chronic headaches

Migraine headaches (sometimes called chronic headaches) are moderate to severe recurrent headaches, often occurring on one side of the head, which may last from a few hours to several days. It is estimated that about 6% of men and 18% of women sufferer from migraines in the U.S.