How to Keep a Headache Diary Your Doctor Will Actually Read

You said it happens "quite often". Your doctor wrote down "intermittent headaches". Six months later, nothing has changed, because nobody has anything to change it with.

A headache diary sounds like homework. In practice it is the shortest route to being taken seriously, because it converts the one thing nobody can verify, your memory, into something a clinician can read in thirty seconds.

The catch is that most people track the wrong things, give up in week two, and conclude that tracking does not work.

🎯 Why a diary changes the appointment

Headache medicine is unusual: there is rarely a scan or a blood test that settles it. Diagnosis rests almost entirely on pattern. How often, how long, what it feels like, what came before it, what you took and whether it worked.

Every one of those is a question about the past, and the past is exactly what a tired brain reports badly. Most people underestimate frequency when asked in a room, and overestimate the severity of whatever happened most recently.

A written record is not about being organised. It is about not having to trust your recall in the one conversation where accuracy matters.

✍️ The six things worth writing down

Everything else is optional. These six carry nearly all of the signal:

1. The date, and whether there was a headache at all. Days without one are data too. A blank line is not a missed entry.

2. Severity, on a scale you keep constant. Zero to ten is fine, and it is the scale the Migraine Trust suggests alongside a simple mild, moderate or severe. What matters is that today's seven means the same as last month's seven.

3. Where it is, in two or three words. Base of the skull, behind one eye, band around the head. Location is one of the fastest sorting tools a clinician has.

4. How long it lasted. Rough hours are enough. Duration separates several headache types on its own.

5. What you took, and whether it helped. Including the times you took nothing, and including a second dose if you took one. Response to treatment is diagnostic information in its own right.

6. One word about the day. Poor sleep, long drive, skipped lunch, hot room, period due. This is the column that eventually explains the pattern.

If that still feels like a lot, the National Headache Foundation suggests starting with frequency, duration and how much the headache affected what you were doing, then adding detail once the habit holds. Tracking everything at once is one of the commonest reasons a diary gets abandoned.

⏱️ Fill it in the same day, not at the weekend

This is the single rule that decides whether the record is worth anything.

Catching up on Sunday turns six days of data into one guess. Not because you are careless, but because headache days blur together in a way that ordinary days do not, especially when brain fog is in the picture.

The version that survives is the one that takes under a minute. If your system needs five minutes, you will abandon it on precisely the days that matter most, the bad ones.

📅 How long before it means something

One month is the usual starting point, and it is what most headache clinics ask for before an appointment. Patterns start surfacing around week three, and anything cyclical, hormonal, weekly, weather-related, needs longer than that before it is visible at all.

That is worth knowing in advance, because most people quit at the point just before it becomes useful.

If you are tracking towards a specific appointment, work backwards from the date and start early enough to arrive with something. Four weeks of consistent lines is more persuasive than four months of scattered ones.

🩺 What to actually hand over

Do not hand over thirty individual daily pages. Nobody reads those, and burying the pattern is the most common way a good diary gets wasted.

Bring the overview page: one month on one sheet, where frequency and clustering are visible at a glance. Then write two or three sentences at the top summarising what you see. "Fourteen headache days in thirty. Nine were in the week before my period. Painkillers helped on four."

That is the version that changes what happens next. Our guide to preparing for an appointment covers how to lead with it, and if you have been dismissed before, these scripts are written for exactly that.

🦴 If your headaches start in your neck

One pattern worth flagging while you track, because it is frequently missed in people with hypermobility: pain that begins at the base of the skull, builds through the day, and eases when you lie down. That combination has a mechanical explanation rather than a migraine one, and it is covered in why hEDS headaches start in your neck.

If that describes yours, note the position column carefully. It is the detail that redirects the whole conversation.

❓ Questions, answered

📚 Sources & further reading

The information in this article is drawn from the following sources. We encourage you to explore them, and to use their templates alongside ours.

• The Migraine Trust: Keeping a headache diary (what to record, and a downloadable monthly template)

• National Headache Foundation: Tracking diaries (starting with frequency, duration and function, then adding detail)

• American Migraine Foundation: Headache journals and tracking your migraine

• National Migraine Centre: Headache diary (recording a month before an appointment)