Share 'Dark Chocolate and migraines, some thoughts'

I should preface this by saying that migraine triggers are personal, so I might just be describing my own condition. As a chocolate lover, I am vexed by the fact that some dark chocolates seem to be the sure path to migraines.  I was wondering if anyone had any insight into what makes them that way.  Oddly, for me certain brands and products are very, very likely to cause them while others do alm…