I do recreationally partake of psilocybin (for "spiritual" and simply entertainment reasons), and this was something that I personally have noticed: I no longer have migraines. Previously I suffered extreme migraines that would easily knock me out for a day, I couldn't take any medicine or I would vomit it back up, etc. I haven't since my first "shroom" experience.

The weird thing is that I get the pre-migraine experience at the same rate, it just isn't followed by a migraine. Previously I'd get the vision distortions that would get worse to the point that I could barely see, and then an extreme migraine would start. I still get those vision distortions (every week or two) just as frequently, but they're followed by just returning to normal.

This is obviously single case anecdotal, could be purely coincidental, and I don't encourage anyone to base any action on it, but it was something I literally had a discussion about this weekend.