I'm not sure what I had first, diabetes or migraine. Maybe diabetes.
I used to suffer from it more often when I was a kid/young teen, but it became less and less within the last few years. I sure have headaches sometimes but a headache is not a migraine.
I've never thought about any connection between the two.
But it is possible that I suffer less from migraines than my relatives... I don't know.
The only connection I can draw for sure is that I get a headache, if my bg raises to fast after being very low.