How to keep a migraine diary your doctor can use

Updated 2026-07-17 · General information, not medical advice

Headache organizations — from the American Migraine Foundation to The Migraine Trust and the National Headache Foundation — consistently recommend the same unglamorous tool: a diary. Not because writing things down is therapeutic, but because migraine care runs on data that only you can collect. A clinician sees you for minutes at a time, weeks or months apart. Your diary is the record of everything in between.

Yet most diaries die within a fortnight. They ask for too much, on exactly the days when you can give the least. This guide covers what actually needs to be in a migraine diary, how to keep the habit alive, and how to turn months of entries into something a clinician can read in two minutes.

What a migraine diary is for

A diary answers questions that memory alone answers badly:

Frequency. How many headache days did you actually have last month? Recalled estimates drift; a daily record doesn't.
Severity and impact. Were attacks mild but constant, or rare but disabling? The distinction changes the conversation with your clinician.
Medication use. What did you take, how often, and on how many days? Clinicians routinely ask for exactly this.
Change over time. If anything about your care changes, the diary is the before-and-after evidence.

The American Migraine Foundation's guidance on headache journals suggests recording severity (a simple scale is fine), accompanying symptoms, medications taken, and anything potentially relevant such as possible triggers or cycle timing — and, importantly, notes that there is no single "right" format. The best diary is the one you keep.

The core fields

If you record nothing else, record these, every day:

Did you have a headache today? Yes or no. This alone builds your headache-day count.
How bad was it? A simple scale — mild, moderate, severe, or 0–10.
How much did it affect your day? Function matters as much as pain. "Worked normally", "pushed through", "couldn't function" is enough.
What did you take? Medication name, dose, and roughly when.

Everything else — symptoms, suspected triggers, sleep, stress, weather — is a refinement. Migraine Canada's diary guidance makes the same point: start with a minimal daily record you can sustain, and add detail once the habit is stable.

Why no-headache days are data

Here's the mistake almost everyone makes: only logging bad days. A diary of attacks with silent gaps is ambiguous — was that quiet week genuinely headache-free, or did you just stop logging? Clinics that ask patients to keep diaries, like the UK's National Migraine Centre, want the full calendar: good days establish the denominator that makes frequency meaningful.

Recording a good day should take seconds. One tap that says "no headache today" is one of the most valuable entries in your whole diary, because it makes every other entry trustworthy.

Keeping the habit alive

Anchor it. Attach the entry to something you already do daily — brushing teeth, evening tea, plugging in your phone.
Make the worst-day version tiny. On attack days you need a version of the diary that takes five seconds, in the dark, with one eye open. Detail can wait until tomorrow.
Don't backfill more than a day or two. Reconstructed weeks are guesses wearing a diary's clothes. An honest gap is better than invented data.
Review monthly, not daily. Obsessing over each entry invites anxiety. Once a month, look at the shape: headache days, medication days, anything odd.

From diary to appointment

The National Headache Foundation frames diaries as a way to help your doctor help you — but a stack of raw entries isn't a report. Before an appointment, distill:

Headache days and no-headache days per month
Attack pattern: typical severity, duration, and symptoms
Medication days per month, by medication
Your top questions, written down in advance

If you keep a paper diary, spend twenty minutes summarizing it onto one page. If you use an app, let it do the arithmetic. Either way, lead with the summary and offer the detail — a clinician can always drill down, but they can't un-drown from forty pages of entries.

How Halira helps

Halira, a private migraine diary launching soon on Google Play, is built around exactly this workflow: a five-second Daily Stoplight entry for pain and function on any day — including no-headache days — plus fuller attack logging with symptoms, possible triggers, and medications when you have the energy. At appointment time it assembles a doctor report: appointment brief, diary table, medication summary, function impact, data completeness, and your clinician questions, exported as PDF or CSV. Everything stays on your phone; there's no account and no cloud.