If migraine-like headaches seem to arrive with your period, timing can help make the pattern clearer. A simple diary cannot diagnose menstrual migraine, but it can show whether attacks repeatedly fall in the menstrual window, what symptoms come with them, and what details a clinician may need.
What menstrual migraine means
“Menstrual migraine” describes migraine attacks that repeatedly occur around the start of menstruation. It does not mean that every headache during a period is migraine, and the timing alone does not rule out other causes.
The International Classification of Headache Disorders separates two patterns. Pure menstrual migraine occurs in the menstrual window and not at other times of the cycle. Menstrually related migraine occurs in the same window but also happens at other points in the cycle.
These are timing patterns layered onto migraine features. They are not blood-test results, and they cannot be confirmed from a single cycle.
The timing window, in plain English
Day 1 is the first day of bleeding. The relevant window runs from day −2 through day +3: two days before bleeding starts, the first day of bleeding, and the next two days. Under ICHD-3 criteria, qualifying attacks occur in that window in at least two out of three cycles.
What a migraine attack can feel like
Migraine is more than a severe headache. Common features can include pulsing or throbbing pain, pain that is worse with routine activity, nausea, vomiting, and sensitivity to light or sound. Pain may be on one side, but it does not have to be.
Some people have aura, such as temporary visual, sensory or speech symptoms. Aura and menstrual timing are separate questions. New neurological symptoms should not be self-labelled as aura, particularly if they are different from a person’s established pattern.
Period-linked attacks may feel longer or harder to manage for some people, but individual experiences vary. Severity by itself does not prove a menstrual pattern.
Use a diary for at least two cycles
NICE recommends using a headache diary for at least two menstrual cycles when menstrual-related migraine is suspected. Its broader headache guidance suggests that a useful diary can capture frequency, duration, severity, associated symptoms, medicines used, possible triggers, and the relationship to menstruation.
Two cycles are a practical minimum for seeing whether a pattern begins to repeat. Three cycles make it possible to compare the record with the “two out of three cycles” classification threshold. A clinician may ask for longer tracking when cycles are irregular, attacks are frequent, or the pattern remains unclear.
What to record each day
- Bleeding dates: mark the first day of bleeding clearly, then count the days before and after it.
- Headache start and finish: record the date and approximate time rather than “morning” or “all day” when possible.
- Pain features: note location, pulsing or pressure quality, and whether normal movement made it worse.
- Associated symptoms: include nausea, vomiting, light or sound sensitivity, and any visual, sensory or speech symptoms.
- Impact: note whether you could work, study, drive, exercise, sleep and manage routine care.
- What you used: write the exact medicine or other measure, the time used, and what happened next. Do not change prescribed treatment based only on the diary.
- Context: sleep disruption, missed meals, illness, dehydration and major stress can help a clinician interpret the pattern without assuming they caused the attack.
Use a paper calendar, a notes app or a dedicated tracker—whichever you can complete consistently. A short, accurate record is more useful than an elaborate diary that is filled in from memory weeks later.
What the diary can—and cannot—tell you
A diary can make repeated timing visible. It can also show headache days outside the menstrual window, changing symptoms, frequent medicine use, and the amount of daily function lost.
It cannot confirm on its own that migraine is the correct diagnosis. It cannot determine whether a hormonal option, migraine medicine or contraceptive is safe for you. Medical history matters, including whether aura occurs and whether there are cardiovascular, clotting, pregnancy or other risk factors.
Do not use the diary as a reason to wait through a red-flag symptom. A tracking tool is for pattern recognition, not emergency triage.
When to arrange a routine appointment
Arrange a non-emergency appointment when headaches are recurring, are difficult to control, interfere with daily life, or appear to follow a menstrual pattern. Bring the diary and a complete list of prescription medicines, over-the-counter products, contraceptives, hormones and supplements.
It is also worth seeking assessment when a previously stable pattern becomes more frequent or severe, when you are relying on acute headache medicine often, or when you are unsure whether symptoms are migraine, aura or something else.
Headache and fatigue can have more than one explanation. If heavy periods or other symptoms raise a concern about iron deficiency, the separate guide to iron deficiency symptoms and testing explains why symptoms alone do not diagnose low iron.
When headache symptoms need urgent help
Urgent assessment is also appropriate for a new severe headache with fever or a stiff neck, a major change after a head injury, new loss of vision, or a clearly different neurological symptom. Follow the emergency route where you live.
If you have an established aura pattern, seek prompt advice when an aura lasts longer than usual, is markedly different, or includes weakness. The NHS migraine guidance lists urgent and emergency warning signs, while NICE advises evaluation of atypical aura symptoms.
Common questions
Is every headache during a period a menstrual migraine?
No. Timing is only one part of the pattern. The attack also needs migraine features, and other causes of a new or changing headache may need assessment.
How many cycles should I track?
NICE recommends at least two menstrual cycles for diagnosing a menstrual-related pattern. Tracking three cycles helps show whether attacks occur in at least two of three cycles, as described in ICHD-3 criteria.
Does menstrual migraine always happen without aura?
The main ICHD-3 appendix categories are defined for migraine without aura, while alternative appendix categories also address menstrual timing with aura. In practical care, tell a clinician about any visual, sensory, speech or motor symptom rather than deciding the subtype yourself.
Should I start a supplement or hormone after spotting a pattern?
Not on the basis of a diary alone. Product choice and safety can change with aura, other medicines, pregnancy plans, cardiovascular or clotting risk, and other health history. Discuss options with an appropriate clinician or pharmacist.
Related reading
Sources and review notes
- International Headache Society — ICHD-3: Pure menstrual migraine without aura. Reviewed July 26, 2026.
- International Headache Society — ICHD-3: Menstrually related migraine without aura. Reviewed July 26, 2026.
- NICE — Headaches in over 12s: diagnosis and management. Reviewed July 26, 2026.
- American Migraine Foundation — Menstrual Migraine Treatment and Prevention. Reviewed July 26, 2026.
- NHS — Migraine. Reviewed July 26, 2026.
Editorial note: This article is general health education. It was reviewed against the cited classification and guideline sources on July 26, 2026. It does not provide a diagnosis or individualized treatment plan.
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