A German study found that alcohol consumption and cigarette smoking in young adults were associated with higher rates of migraines and tension-type headaches, while coffee drinking combined with physical inactivity were linked to migraines.

http://www.physorg.com/news194923293.html
http://health.usnews.com/health-news/family-health/pain/articles/2010/06/07/teen-headaches-tied-to-alcohol-
coffee.html