Here is an article from WebMD that tells you the more frequent triggers... foods high in certain substances like tyramine, or nitrates. Some migraineurs are sensitive to these substances.

http://www.webmd.com/migraines-heada...specific-foods

Another possibility is a food allergy, such as to wheat, or to yeast. If you suspect a food allergy or sensitivities you'd need to eliminate all possible sources for a while, and see if the headache situation improves. If it does, you can try re-introducing things gradually to try to narrow down the culprits.

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