http://articles.mercola.com/sites/articles/archive/2008/01/02/frequent-headaches.aspxAbout 7 million adults in the United States suffer from headaches at least every other day, accounting for millions of days of missed work or reduced job efficiency. This study also determined that frequent headache is more prevalent among women (5%)enCommunityServer 2008.5 SP1 (Build: 31106.3070)