OsteoVIf your worst migraines seem to arrive like clockwork, a day or two before your period, you are not imagining it. The link between migraine and the menstrual cycle is real, well documented, and far too often waved away. Here is what is actually going on, and what tends to help.
More than a coincidence
More than half of women who live with migraine notice that their attacks are linked to their periods. For most, migraine still happens at other times of the month too, but the days around bleeding bring a reliable, heavier wave. Clinicians describe the vulnerable window as days minus two to plus three: the two days before your period starts and the first three days of bleeding. If you have ever glanced at the calendar and spotted the pattern yourself, that window is probably why.
It is the drop, not the level
The trigger is not oestrogen being high or low as such. It is the fall. In the days before your period, oestrogen drops sharply, and for a migraine-prone brain that withdrawal can be enough to set off an attack. That is why the pattern is tied so closely to timing rather than to how you feel in general. It also helps explain why these attacks usually come without aura, even in women who do get aura at other points in the cycle.
Why these attacks feel worse
This part matters, because it is often the bit that gets missed. On average, perimenstrual attacks tend to last longer, come back after treatment, and respond less well to the usual painkillers than migraines at other times of the month. So if you have quietly decided that your period migraines are simply the bad ones, the evidence is on your side. That is not you being dramatic or failing to cope. It is a recognised feature of hormonally influenced migraine.
Making the pattern work for you
The most useful first step is to establish whether your migraine genuinely tracks your cycle, because that changes what helps. A short, honest record across two or three cycles usually tells the story. Mark the days you bleed and the days you get a migraine, then look for the overlap. You are not aiming for a forensic diary of every meal and mood. You are looking for one thing: do the attacks cluster in that minus two to plus three window.
If they do, a few approaches become worth discussing:
- Treat early and properly. Because these attacks build fast and hit hard, taking effective acute medication promptly, as agreed with your prescriber, tends to work better than holding out.
- Consider a targeted preventive plan around the window. For some women, a focused strategy in the days around the period can reduce the load. This is a decision to make with a clinician who knows your history, not a blanket rule.
- Look at contraception in the round. Hormonal contraception settles the pattern for some women and worsens it for others, and it carries specific considerations if you have migraine with aura. That is worth a proper conversation rather than guesswork.
- Steady the rest of the picture. Sleep, meals, hydration and stress do not cause menstrual migraine, but a body already running low has less room to absorb a hormonal dip.
The whole picture, not just the hormones
Hormonal migraine rarely travels alone. It often sits alongside neck tension, broken sleep and stretches of low mood, and each of those can make an attack more likely or harder to shift. That is the frustration of care split across silos: your GP looks at the headache, someone else considers your cycle, and nobody joins them up. A full assessment sets out to do exactly that, so the plan fits your particular pattern rather than a general rule.
When to seek urgent care
See a doctor promptly, or call 999, if you have a sudden, severe "thunderclap" headache, a headache with fever and a stiff neck, new weakness, numbness or confusion, or a headache after a head injury. New or changing headaches always deserve medical assessment. If you have migraine with aura, mention it before starting any oestrogen-containing contraception.
If your headaches seem to follow your cycle, a full assessment can help you understand what is driving them and what to do next. You are welcome to book an appointment or get in touch.
- The Migraine Trust. Menstrual migraine. migrainetrust.org
- National Institute for Health and Care Excellence (NICE). Clinical Knowledge Summaries: Migraine. cks.nice.org.uk
- International Classification of Headache Disorders, 3rd edition (ICHD-3), A1.1.1 Pure menstrual migraine without aura. ichd-3.org
- MacGregor EA. Migraine, menstruation and menopause. Reviewed in Role of Estrogens in Menstrual Migraine, PMC9025552. ncbi.nlm.nih.gov