What should i do to find out what triggers my headaches?

Keep a daily log: Keep a log of foods (especially aged cheeses, chocolates, meats with nitrates, alcohol, pickled foods, & msg), physical activities, fatigue, missed meals, stress, sun exposure, strong smells, lack of sleep, medications (including pain medications), weather changes and menstrual periods. Look for patterns. When you find possible triggers, eliminate them and see if it helps.

Trial and error: You can try avoiding some triggers: common triggers include coffee, chocolates, yellow cheese, other dairy products, red meat, nuts, alcohol - consult your primary physician or neurologist for medical management.