Symptom guide

Hormonal migraine in women: why it happens and what helps

Migraine without aura is commonly linked to falling oestrogen, which is why it often clusters around your period, the pill-free week of combined hormonal contraception, and perimenopause. Perimenopause can make migraine more erratic because hormone levels swing rather than simply drop. HRT's effect on migraine varies by person and by the type of HRT used, so it is a conversation for your GP or a menopause specialist rather than something to predict in advance. Some people explore magnesium or riboflavin, but the evidence is mixed and neither is a guaranteed fix. This is information, not medical advice.

What makes a migraine hormonal

Migraine without aura is commonly linked to the drop in oestrogen that happens in the days before a period starts. This pattern is well established in NICE guidance on headache diagnosis and management, and is explained in more detail by UK migraine charities such as the Migraine Trust and the National Migraine Centre. The same falling-oestrogen mechanism can trigger migraine during the pill-free week of combined hormonal contraception, which is why some women notice a predictable pattern of headaches tied to their pack cycle rather than their natural one.

Not every migraine in women is hormonal, and other triggers such as sleep, stress, dehydration and certain foods can play a part too. But if your migraines cluster around a particular point in your cycle, or around the pill-free week, that pattern is worth noting and mentioning to your GP, since it can help with diagnosis and with deciding what to try next.

Why perimenopause can change your migraine pattern

Perimenopause can worsen migraine frequency or severity for some women, and the reason is different from the usual period-linked pattern. In a normal cycle, oestrogen falls in a fairly predictable way. In perimenopause, hormone levels become more erratic, rising and falling unevenly rather than following the familiar rhythm, and it is that erratic fluctuation, not simply lower hormone levels, that appears to unsettle migraine for some women. This pattern is described by UK migraine charities and by British Menopause Society material.

This does not mean migraine automatically gets worse for everyone in perimenopause. Some women notice little change, and for some migraine can ease once periods stop and hormone levels settle after menopause. If your migraines are becoming more frequent, more severe, or are changing in character around this life stage, it is worth discussing with your GP, partly to check the pattern fits typical perimenopausal migraine and partly to talk through options. Our perimenopause guide covers the wider symptom picture.

HRT and migraine

HRT's effect on migraine varies by individual and by the type and route of HRT used. Some women find their migraine improves once they start HRT, because it can smooth out some of the hormonal fluctuation described above. Others find their migraine needs adjusting, for example by changing the type, dose or route with their prescriber. There is no general rule that reliably predicts which way it will go for a given woman, so this is not something we can tell you in advance from a guide.

If you are considering starting HRT and have a history of migraine, or if your migraine pattern changes after starting or adjusting HRT, speak to your GP or a menopause specialist. They can weigh up the type and route of HRT alongside your migraine history and, where relevant, whether you have migraine with aura, which is a specific factor a prescriber needs to know about.

Supplements: what the evidence says

Some people explore magnesium and riboflavin (vitamin B2) in relation to migraine. Evidence for both exists in the wider clinical literature, but it is mixed, and neither is a guaranteed fix or a substitute for proper diagnosis and treatment. Some of the doses studied for migraine are well above typical food-supplement amounts, which is part of why this is a discuss-with-your-GP decision rather than a straightforward buying decision, particularly around dose and whether it is appropriate alongside anything else you take.

We do not present magnesium or riboflavin as something that treats or prevents migraine. If you are thinking about trying either, our upper safe limit checker can help you understand where a given dose sits against established upper limits, but it is not a substitute for asking your GP whether it is a sensible option for you.

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Frequently asked questions

Why do I get migraines around my period?

Migraine without aura is commonly linked to the drop in oestrogen that happens just before a period starts. This is well-established in NICE guidance on headache diagnosis and management and is explained by UK migraine charities such as the Migraine Trust and the National Migraine Centre. The same pattern can show up during the pill-free week of combined hormonal contraception, when oestrogen also falls.

Does perimenopause make migraines worse?

For some women, yes. Perimenopause can worsen migraine frequency or severity because hormone levels become more erratic than they are in a normal monthly cycle, rather than just lower. UK migraine charities and British Menopause Society material both describe this pattern, though it does not affect every woman in the same way.

Does HRT help or worsen migraine?

It varies by individual and by the type and route of HRT. Some women find their migraine improves once they start HRT, and others find it needs adjusting with their prescriber. There is no general rule that predicts which way it will go for you, so this is a conversation to have with your GP or a menopause specialist, particularly if your migraine pattern changes after starting or adjusting HRT.

Can magnesium help with migraine?

Some people explore magnesium and riboflavin (vitamin B2) for migraine, and both have been studied in the wider clinical literature, but the evidence is mixed and neither is a guaranteed fix. Some studied doses are well above typical food-supplement amounts, so discuss dose and suitability with your GP before starting anything, rather than treating a supplement as a substitute for a proper diagnosis.

This is information, not medical advice, and is not a substitute for a registered clinician. If your migraine pattern changes, becomes more frequent or severe, or you are considering HRT or a supplement alongside migraine, speak to your GP. Seek urgent medical help for any of the red-flag symptoms above.

OM

Oliver Mackman

Editor, Her Vitals

Oliver leads Her Vitals's editorial coverage of women's life-stage health and supplements. He curates and reviews existing branded products across trying to conceive, pregnancy, postnatal, perimenopause, menopause and the senior years, weighing what the evidence supports against guidance from bodies such as EFSA, the NHS and NICE, and is clear that the content is information rather than medical advice.

Last reviewed: 4 August 2026

Reviewed by Oliver Mackman, Editor. Editorial review against published guidance; not a clinical review.