Menstrual migraine: when attacks follow your period

Every month, you seem to know it is coming. A day or two before your period, or on the first day, the throbbing starts. Light hurts. Food feels impossible. The usual tablet helps less than it does at other times, and the headache lingers into the second day.

If this sounds like you, you may have been told it is 'just hormones' or 'just period pain'. For many people it is a recognisable pattern called menstrual migraine, and it is worth taking seriously. This article explains what it is, what research says about why it happens, and how to prepare for a medical visit. It cannot tell you whether you have it. Only a doctor can diagnose it.

What menstrual migraine means

Migraine is a neurological condition with attacks of throbbing, often one-sided headache, with nausea, or sensitivity to light and sound. The NHS says attacks that happen just before or during a period are called menstrual migraines, and that they tend to be longer and more severe. A 2021 Lancet Neurology review by Vetvik and MacGregor describes menstrual migraine as migraine associated with menstruation by more than chance.

The International Classification of Headache Disorders, third edition (ICHD-3, Cephalalgia 2018) describes migraine without aura as at least five attacks, each lasting 4 to 72 hours if untreated or not helped by treatment. The headache has at least two of these features: one-sided, pulsating, moderate or severe pain, and worse with routine activity such as walking up stairs. During the headache there is nausea or vomiting, or both light and sound sensitivity.

Menstrual migraine is in the appendix of ICHD-3, which holds criteria that need more study. For pure menstrual migraine without aura, attacks occur 'exclusively on day 1 +/-2 (ie, days -2 to +3) of menstruation in at least two out of three menstrual cycles and at no other times of the cycle'. The first day of bleeding is day 1, the day before is day -1, and there is no day 0. ICHD-3 counts menstruation as bleeding from the normal cycle or from stopping hormonal contraception that contains progestogen. It recommends a prospective diary for research, but says this is not mandatory for a clinical diagnosis. Treat this as a guide, not a self-test.

Pure menstrual versus menstrually related

• Pure menstrual migraine: attacks happen only in that window around your period, and at no other time in the cycle.
• Menstrually related migraine: attacks happen in the same window in at least two of three cycles, and also at other times of the cycle. One review (Maasumi 2017) puts pure menstrual migraine at about 1% of people and menstrually related migraine at about 6 to 7%, so the related type is the more common one.

The split matters because treatment choices can differ between the two, and because it shows why a diary is needed. If you have attacks all through the month, a doctor looks at the whole picture, not only your period.

How common is it?

Numbers depend on how strictly the criteria are applied. In a 2014 population study in Norway (Vetvik and colleagues, Cephalalgia), 5,000 women aged 30 to 34 were screened. About 7.6% of all women, and 22.0% of women with migraine, had some type of menstrual migraine, using the group's widened version of the criteria. Most had it without aura. Only women who reported migraine in at least half of their periods were interviewed, so this is an estimate and not an exact count. A 2021 review by the same group puts the figure at about 20% to 25% of women with migraine in the general population, and 22% to 70% of those seen in headache clinics, and says loose use of the criteria explains conflicting figures.

The American Migraine Foundation says more than half of women with migraine report that attacks are linked with menstruation. That is a broader, self-reported link. It is not the same as meeting formal criteria.

In India, a 2017 community study in Kolkata (Ray and colleagues, Neurology India) found one-year migraine prevalence of 14.1%, with the highest disease burden among women aged 30 to 34. It did not study menstrual migraine.

Why does it happen?

Researchers are still working this out. Vetvik and MacGregor (2021) say two mechanisms have been identified: estrogen withdrawal and prostaglandin release. Estrogen and progesterone levels fall in the days before a period. The American Migraine Foundation says estrogen drops rapidly just before menstruation, which may make some people's brains more vulnerable to an attack, and that the rapid change matters more than the level itself. A 2008 review (Martin and Lipton, Headache) says a significant drop in circulating estrogen in the 2 to 3 days before menses is thought to be partly responsible.

Hormones are one factor among many. The same AMF page says hormones are one of many contributing factors, so other things can add to the effect. A migraine diary can help you see how they combine.

Why can these attacks be longer and harder to treat?

Several studies agree on the pattern. A 2003 Dutch population study (Couturier and colleagues) confirmed that menstrual migraine attacks were more severe, longer and more resistant to treatment than attacks at other times of the month. A 2015 review (Nierenburg and colleagues) described them as usually more debilitating, of longer duration, more prone to recurrence and less responsive to acute treatment. In a diary study of women from the general population, menstrual attacks of migraine without aura lasted about 10.7 hours longer on average and were more often accompanied by severe nausea than non-menstrual attacks, but only in women who met the ICHD criteria (Vetvik and colleagues, 2015). The reasons are not fully settled. A 2017 review by Maasumi and colleagues points to the effects of ovarian hormones, specifically estrogen.

Track attacks against your period

Confirming the pattern needs records, not memory. NICE says menstrual-related migraine should be diagnosed using a headache diary kept for at least 2 menstrual cycles. The American Migraine Foundation calls a diary one of the most useful tools for managing menstrual migraine. It suggests recording the first day of your period, when attacks start and end, symptoms, medicines, possible triggers and how long each attack lasts.

Manas has a cycle tracker at /track/cycle, where you can log your period dates. We are also building a migraine diary at /migraine/diary, so that attacks and cycle days can sit side by side. Until then, any notes app or paper calendar will do. Mark day 1 as the first day of bleeding, then count back to day -2 and forward to day +3.

Treatment in general terms, decided with a doctor

Options depend on how often attacks come, how severe they are, whether you have aura, your other health conditions and whether you want to avoid pregnancy. The American Migraine Foundation and NICE describe these broad approaches.

• Everyday habits: consistent sleep, regular meals, enough fluids, stress management and exercise as you can manage.
• Acute treatment: medicine taken early in an attack. A doctor can advise which kind suits you, and how often it is safe to use.
• Short-term preventive treatment: medicine taken for several days around the expected start of the period, when attacks are predictable. NICE says a doctor can consider this, using a triptan on the days migraine is expected, for predictable menstrual-related migraine that does not respond well enough to standard acute treatment. A 2015 systematic review found triptans had the strongest evidence for both acute treatment and short-term prevention.
• Longer-term preventive treatment: for people who also have frequent attacks through the month.
• Hormonal approaches: the American Migraine Foundation says hormonal medicines such as certain birth control or hormone therapy can change migraine patterns, and that some people improve, some get worse and many see no change. Any hormonal option needs a doctor's review.

Vetvik and MacGregor (2021) point out that the evidence for these strategies is not robust, partly because many trials did not separate true menstrual migraine from attacks that fall around a period by chance.

Links with PMS, PMDD and perimenopause

Menstrual migraine and premenstrual symptoms often overlap. A 2006 diary study of 21 women with migraine (Martin and colleagues, Headache) found a moderate link (correlation 0.47) between how severe premenstrual symptoms were and how severe headaches were across natural cycles. A 2025 survey of 3,131 female college students in China (He and colleagues, Scientific Reports) found that 18.8% of students with PMS screened positive for migraine on a questionnaire, and those with migraine had worse sleep and higher anxiety, depression and stress scores. If your mood drops sharply before your period, read about PMS, PMDD and depression and about PMDD. A diary that tracks both mood and headache can help a doctor see which is which.

In the years before menopause, hormones swing more. A 2015 systematic review (Ripa and colleagues, International Journal of Women's Health) found that community studies show improvement after menopause, with a possible increase in perimenopause. A 2014 review (Martin, Neurological Sciences) says migraine tends to peak during the late menopausal transition. The NHS says migraine often improves after menopause. A 2025 Norwegian study of 4,825 women found that 46.3% of them still had migraine after menopause (Bugge and colleagues, Journal of Headache and Pain), so it is not a given. If your pattern changes in your forties, tell your doctor.

When to see a doctor

The NHS says to see a GP if you regularly get migraine before or during your period, if attacks are severe or getting worse, or if they happen more than once a week. Bring your diary, a list of every medicine you take, and your questions. If you are pregnant, or think you might be, get advice before taking anything for migraine.