How to Build a Hormonal Migraine Calendar (and Finally See Your Pattern)
Three cycles of honest tracking answers questions that years of guessing can't: whether your migraines are hormonal, which cycle days are dangerous, and what your doctor needs to see. Here's exactly what to log.
"Are my migraines hormonal?" is one of the most-asked questions in migraine care — and one of the few with a cheap, definitive answer. You don't need lab work. You need a calendar, three cycles of honesty, and about thirty seconds a day. Here's exactly how to do it.
What to Log (Keep It Minimal)
Tracking fails when it's ambitious. Log four things daily:
1. Cycle day. Day 1 = first day of bleeding. Just the number. If your cycle is irregular (common in perimenopause), log bleeding days and any cycle signs you notice — irregularity is itself data.
2. Attack yes/no, with severity. A simple 1–3 or 1–10 score. Include "almost-migraine" days — heavy heads and mild attacks count in patterns.
3. The big confounders, in one line. Sleep quality, unusual stress, alcohol. One word each is enough — you need these to avoid blaming hormones for a bad night's work.
4. Hormonal events. Pill days and placebo week if you use hormonal contraception (see Birth Control and Migraines), any HRT changes, and anything cycle-related your body reliably does.
Weather rounds out the picture, since pressure drops love to take credit for (or amplify) hormonal attacks — but don't log it manually; an app like MigraineCast records local conditions automatically alongside your entries.
How to Read It After Three Cycles
Why three? One cycle proves nothing — any month contains coincidences. Three cycles showing the same clustering is a pattern. Look for:
The classic window: day −2 to +3. Attacks clustering from two days before bleeding through day three of it are the signature of menstrual migraine — the estrogen-withdrawal pattern described in our menstrual migraine guide.
The mid-cycle blip. A smaller cluster around ovulation (roughly day 12–16 in a 28-day cycle) marks the briefer estrogen dip some women react to.
Placebo-week clustering if you're on combined contraception — the manufactured version of the withdrawal trigger.
Stacked-trigger attacks. Check what else was true on attack days. Many women find hormonal windows alone don't break through — but a hormonal window plus a storm front or short night does. That's actionable: you can't move your cycle, but you can guard those collision days.
What It Changes at the Doctor's Office
"I think they're hormonal" invites a shrug. A three-cycle calendar showing attacks pinned to day −2 through +2 invites a treatment plan — clinicians take documented patterns seriously because they can act on them. A confirmed menstrual pattern opens specific conversations (cycle-timed preventive strategies exist for exactly this situation), and a documented absence of hormonal clustering is equally valuable: it redirects attention to your real triggers instead of an assumed one.
Bring the calendar itself, not your summary of it. Patterns you haven't noticed may be visible to a trained eye — and if you track in MigraineCast, the exportable report is built for exactly this appointment.
Frequently Asked Questions
How do I know if my migraines are hormonal?
Track attacks against cycle days for three cycles. Consistent clustering from two days before your period through day three of it (or around ovulation) confirms a hormonal or partly hormonal pattern. Three repetitions distinguishes a real pattern from coincidence.
What should a migraine diary include for hormonal tracking?
Daily cycle day, attack occurrence and severity, one-line notes on sleep, stress, and alcohol, plus pill or HRT days if applicable. Minimal and consistent beats detailed and abandoned — thirty seconds a day is the sustainable dose.
Which cycle days are highest risk for migraine?
The most common danger window runs from day −2 (two days before bleeding) through day +3, driven by the premenstrual estrogen drop. A secondary window around ovulation affects some women. Your calendar tells you which — if either — applies to you.
This article is for informational and educational purposes only and is not medical advice. For diagnosis and treatment of hormonal migraine, consult a doctor or headache specialist.