Coffee and Headaches?

Thanks to Sarah S for this:

Here is the web address of the article I chose to put on the blog: http://www.sciencedaily.com/releases/2009/08/090813083455.htm
Its about the link between coffee and headaches. Although it doesn't really explain why this correlation may exist, it gives evidence proving that the link is valid. I was interested in it because a couple of years ago my mom tried to stop drinking coffee every morning and she would get headaches when she didn't have it. Eventually, after restricting herself from coffee long enough, the headaches went away. But now, whenever she drinks an occasional cup of coffee, the headaches come back. I found this article interesting because it reminded me of the curious link between coffee and headaches.