Hi K_Nelson,
I woke up one Saturday morning with a "bad one" coming on, I'd had enough and heard Daith Piercings worked, so I went down to the local tattoo/piercing shop and had it done there and then.
It sounds dramatic, but it cleared the migraine within a couple of hours and all my "secondary symptoms" decreased immediately. I felt great. In fact I hadn't realised how much suffering with migraines had affected my moods until they were actually "gone".
Unfortunately the piercing didn't take for me, so, I had to remove it a few months later and within a couple of weeks my symptoms started coming back again and they increased in frequency and intensity.
So, at the moment I don't have a piercing, but seriously considering trying it again! I don't know the science behind any of this but it worked for me and I hope this helps someone else.
Regards,
Dan