I've been unable to smoke for about 17 months and before I stopped smoking (because of the courts), I never had headaches.

After being put on probo...I was plagued with what was eventually diagnosed as something called Cluster Headaches by two different neurologists. Basically, an even worse version of a migraine.

The pain is always in one spot and is best described as a stabbing or burning feeling. I dunno if the pot was helping it, but I only started to get those headaches after I quit.