General migraine info:
Book: Heal Your Headache, David Buchholz, M.D.
Migraine as food allergy:
People with migraines had reactions to food allergens, the most common reaction was to wheat (78%), orange, eggs, tea, coffee, chocolate, milk, beef, corn, cane sugar, and yeast. When 10 foods causing the most reactions were removed migraines fell precipitously, hypertension declined. (Grant EC (1979). “Food allergies and migraine”. Lancet. 1 (8123): 966–9.)
A specific instance attributed to wheat. (Pascual J, Leno C (2005). “A woman with daily headaches”. The Journal of Headache and Pain. 6 (2): 91–2.)
In accordance with my own experience, researchers could not trigger migraine with bright light by itself. I also observed that bright sun light is not itself a trigger but would make throbbing pain worse once the migraine already started.
And a random case I read. Christine H. Lee’s tiny hole in her heart caused her migraine, which was discovered when it caused her stroke.
The hole, or more accurately a flap, is called a patent foramen ovale, or PFO. All fetuses have a hole in their heart between the left and right chambers, to bypass the lungs as they take oxygen from their mother’s blood. Once born, that flap fuses. And once born, nearly a quarter of humans have holes in their hearts that don’t completely close. For some, the hole is severe and needs to be closed immediately. For many others, the hole is undetected. Maybe like I used to, you get migraine headaches, or have altitude sickness at 5,000 feet instead of 10,000 feet, or find yourself panting while doing a slow jog, no matter how often you train.