h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

When I was still a kid, I could identify a very specific psychological trigger to migraines.

I was a geeky, "indoors" kid who loved spending holidays reading novels, so mention of outdoors activities (mountain hiking being my dad'd favorite) could trigger the worst, full-scale migraines (including loss of half my visual range, nausea, and a terrible pounding headache).
Stress at school, and sports, especially jogging (very boring !), would do the same.

It hardly ever happened again after I could decide for my own outdoors activities (including mountain hiking) !

The only "remedies" I could find confort in were sleeping, and the smell of fresh lavender (any other fragrance/smell would be hardly unbearable).

Beware of sudden onset of extreme headache or visual disturbances. These are also symptoms of stroke.