My dad, who's hardly ever been sick a day in his life, recently started suffering from migraines. So, I was glad to write an article for HowStuffWorks.com called Can perfumes trigger migraines?
Turns out they can. My dad hasn't found his trigger yet, but since he doesn't wear perfume (and neither does my mom) I don't think this is his.
It was still interesting to consider. Maybe it will help you or someone you love!