Table 1. Migraine triggers in one of the earliest large-scale studies.

MIGRAINE TRIGGER	PROPORTION	PERCENTAGE	COMMENT
Menstruation	196/500	62	14% exclusively menstrual
Emotion	388/500	67	Could be an upsetting event such as an argument at home or anxiety shopping
Glare of light	293/500	47	Usually a flicker of light, as in televisIon viewing or exposure to sun
Foods	339/500	25	Fats, fried foods, chocolates, oranges, tomatoes, pineapples, and onions; alcoholic beverages were not included in this study