June 18, 2026

Tracking migraine frequency: episodic vs chronic

Ask someone with migraine how often they get attacks and you'll usually hear a range and a shrug: "a few times a month, more when it's bad." That's not carelessness — attack frequency is genuinely hard to hold in your head, because bad stretches feel enormous and good stretches quietly vanish from memory. Yet frequency is one of the most consequential numbers in all of migraine care. It shapes whether prevention is offered, how treatment is judged to be working, and even how your headache is classified. Counting it properly is one of the highest-value things a diary does. The Migraine Trust emphasises that an accurate record of attack frequency is central to getting the right care.

Count migraine days, not "attacks"

The unit that matters is the migraine day — a calendar day on which you had a migraine, or part of one. This is the standard clinicians and researchers use, and it's more reliable than counting "attacks," because a single long attack that spans two days is hard to score as an event but easy to score as two days. So the rule is simple: any day touched by migraine counts as one migraine day. Tally those across a month and you have the number that everything else hangs on. If your attacks routinely span more than one day, that itself is worth noting — how long does a migraine last puts the typical durations in context.

Episodic and chronic: the line that changes your care

Migraine days per month sort broadly into two categories defined by ICHD-3, and the boundary genuinely matters:

Episodic migraine — fewer than 15 headache days a month
Chronic migraine — 15 or more headache days a month, for more than three months, with at least 8 of those days having migraine features

That threshold of 15 isn't arbitrary trivia. Crossing into the chronic range can change which treatments are appropriate and which preventive options a clinician will consider — some are specifically indicated for chronic migraine. This is precisely why a counted number beats an estimated one: the difference between "about twice a week" and a documented 15-plus days can change the conversation entirely. How many migraine days is chronic and the difference between chronic and episodic migraine cover this in plain terms. Where your own count lands maps onto the migraine-days pages, which frame what a given monthly figure tends to mean.

Track medication days alongside — they travel together

Frequency has a shadow number that should always be counted beside it: your acute-medication days, the days each month you take a painkiller or triptan for an attack. The two tend to rise together, and watching them side by side is how you and a clinician stay alert to medication-overuse headache, where frequent acute treatment can quietly increase headache frequency. Neither number is a diagnosis on its own — but together, tracked over months, they tell a story no single appointment could reconstruct.

How to count it without it becoming a burden

You don't need elaborate logging to get an honest frequency. The minimum viable habit is one mark per migraine day — a tap, a tick — plus a note of anything you took. At the end of each month, add up the migraine days and the medication days. That's it. Two numbers, refreshed monthly, are worth more than pages of detail kept for a fortnight and abandoned. Keeping a migraine diary covers building the habit so it survives real life, and a migraine frequency calculator can turn your logged days into the monthly figure that maps to your care.

What the number gives you back

A reliable frequency count does three things at once. It lets a clinician place you correctly — episodic or chronic — and offer treatment that fits. It provides an honest yardstick for whether a new treatment is helping, because "it feels a bit better" is no match for "I went from 12 migraine days a month to 6." And it catches a worsening trend early, while there's still time to act, rather than after a bad year has already passed. The number itself is not a diagnosis and won't predict your next attack — but it is the single most useful figure you can carry into the room, and it exists only if you count it.

Temple is a tracking tool, not medical advice — consult a healthcare professional.

Temple is coming soon to the App Store — it counts your migraine days and medication days for you, so the monthly number is always ready.