Guide

How to track headache triggers

A headache diary is most useful when it stays honest: it records what happened, and leaves the interpreting to you and your clinician. This guide shows what to record, for how long, and how to avoid the classic trap of seeing causes in coincidences.

1. Record facts, not theories

Good entries are observations: “slept about 5 hours”, “skipped lunch”, “thunderstorm in the afternoon”. Weak entries are verdicts: “my trigger is cheese”. Write down what was going on before and while the headache arrived — even on days you suspect nothing. The blank days are as informative as the headache days.

2. Give it at least two to three weeks

Short stretches over-read coincidence: if you only log a bad week, everything in it looks suspicious. A couple of weeks of daily entries gives you headache days and headache-free days to compare — which is the whole point. Many clinicians will ask for around a month of records.

3. “Appeared together” ≠ “caused it”

Suppose red wine shows up in your notes on 4 of 6 headache days. That is a genuine observation — but it is co-occurrence, not proven cause. Maybe the wine matters. Maybe stressful Fridays come with both wine and headaches. Maybe bad sleep does. Patterns are hypotheses; confirming or ruling them out is a conversation with a healthcare professional, sometimes with a controlled re-introduction. Any tool that declares “your trigger is X” from a diary is overreaching.

4. Bring the record, not the conclusion

At an appointment, a printed month of entries answers the questions clinicians actually ask: how many days, how bad, how long, what else was going on. Let the record speak; offer your hypotheses as hypotheses. If your headaches are frequent, severe, or a new experience for you, seek medical care rather than self-managing from a diary.

5. Pick a format you will actually keep up

The best diary is the one you still fill in after week one. If paper fits your day, print a monthly diary or the food & trigger diary. If you are always at a screen, the online tracker takes seconds per entry and stays in your browser.

This guide is general information, not medical advice. It does not diagnose, treat, or prevent any condition.