When Your Head Is Following Your Cycle

Migraines aren’t “just bad headaches,” and the ones that show up on a schedule each month aren’t a coincidence. For a huge number of women, migraine is a hormonal condition first and a neurologic condition second. That’s why your worst attacks tend to cluster in the two days before your period, why pregnancy can flip your pattern, and why perimenopause often feels like your old triggers stopped working.

June is Migraine and Headache Awareness Month. Migraine affects roughly 18 percent of women in the United States compared with about 6 percent of men, and that 3 to 1 ratio is almost entirely driven by estrogen. At FĒNOM in Fort Worth, we see hormonal migraine come up in three settings: cycling women trying to make sense of a monthly pattern, pregnant patients afraid to take anything, and women in perimenopause whose migraines have gotten dramatically worse. Here’s what’s going on, and what we can do about it.

Why Estrogen Drives the Pattern

The trigger for most hormonally driven migraines is not high estrogen. It is a drop in estrogen. This is called the estrogen withdrawal hypothesis, and it explains the timing of almost everything.

Menstrual migraine.

Attacks cluster from 2 days before your period through the first 3 days of bleeding, which is the window when estrogen falls fastest. Pure menstrual migraine (attacks only at that time) is less common. Menstrually-related migraine, where attacks happen in that window plus other times, is what most women have.

Pregnancy.

Estrogen stays steady and high. Roughly 50 to 80 percent of women with migraine without aura report improvement, particularly in the second and third trimesters. Migraine with aura behaves less predictably and sometimes worsens.

Perimenopause.

Estrogen doesn’t slowly decline. It swings unpredictably. Migraine prevalence in perimenopause runs 10 to 29 percent, and many women whose migraines were well controlled for years see an unwelcome return. The good news: most women improve again after menopause, once levels stabilize.

If your migraines have a clear monthly pattern, started or changed with a new pill, intensified after a baby, or escalated in your 40s, hormones are likely doing a lot of the driving.

Migraine With Aura Versus Without

This distinction matters because it changes what birth control options are safe for you.

Migraine without aura. The headache itself, often one-sided, throbbing, with nausea or light and sound sensitivity, lasting 4 to 72 hours.
Migraine with aura. A reversible neurologic event that usually precedes the headache by 5 to 60 minutes. Most commonly visual (zigzag lines, bright spots, a blind spot that expands), but can also include numbness or tingling, speech changes, or weakness. About 25 to 30 percent of people with migraine have aura.

Per the CDC US Medical Eligibility Criteria and ACOG, migraine with aura at any age is Category 4 (unacceptable risk) for combined hormonal contraception (the pill, patch, or ring) because the combination raises the risk of ischemic stroke. This guidance is being re-examined as modern pills contain far less estrogen than the originals, but until ACOG updates it, we follow it.

If you have migraine with aura, you still have excellent options: progestin-only pills, the hormonal IUD, the implant, the shot, and copper IUDs.

What We Can Do About Menstrual Migraine

When the pattern is predictable, the treatment plan can be predictable too. Most plans combine acute treatment for attacks that happen with a short course of prevention around the vulnerable window.

Acute treatment.

NSAIDs (ibuprofen, naproxen) at the first sign of an attack. Triptans (sumatriptan, rizatriptan, zolmitriptan) for moderate to severe attacks. Gepants (ubrogepant, rimegepant) and lasmiditan are newer options for women who cannot take triptans.

Short-term (mini) prophylaxis.

For predictable menstrual attacks, frovatriptan 2.5 mg twice daily or naratriptan 1 mg twice daily starting 2 days before the expected attack for 5 to 6 days has strong evidence. Naproxen 550 mg twice daily across the same window is a non-triptan alternative.

Continuous hormonal strategies (for women without aura).

Continuous or extended-cycle combined contraception eliminates the estrogen drop by skipping the placebo week. One of the most effective interventions for menstrual migraine without aura.

Magnesium.

Magnesium 400 to 600 mg daily has reasonable evidence and is well tolerated. Diarrhea is the limiting side effect.

Daily preventives.

If you’re having 4 or more migraine days a month, daily prevention (a beta-blocker, topiramate, or a CGRP medication like erenumab or fremanezumab) deserves a conversation with us or a headache neurologist.

Migraine and Pregnancy: What Is Actually Safe

This is one of the most common calls we get from newly pregnant patients with a migraine history. The honest answer is that you have safer options than the internet suggests.

First-line acute treatment. Acetaminophen up to 1,000 mg per dose, no more than 3,000 mg in 24 hours, often paired with caffeine up to 200 mg per day.
If acetaminophen is not enough. Sumatriptan is the most-studied triptan in pregnancy. Pregnancy registries have not identified an increased risk of major malformations, preterm birth, or low birth weight. ACOG considers it reasonable when needed.
NSAIDs. Generally avoided in the first trimester and contraindicated after 20 weeks per the FDA due to fetal kidney effects. Use only on our okay.
What to avoid. Ergot derivatives (ergotamine, dihydroergotamine) and valproate are contraindicated. CGRP antagonists lack pregnancy data and are typically held.
Postpartum. Migraines often return in the first month with the rapid estrogen drop. Sumatriptan and most NSAIDs are compatible with breastfeeding.

When to Call Us

Please call, do not wait for your next visit, if you experience:

A “thunderclap” headache that peaks within seconds to a minute
The worst headache of your life, or a new headache pattern after age 50
A migraine with neurologic symptoms that don’t fully resolve (persistent weakness, vision loss, speech changes)
A new severe headache in the second half of pregnancy or postpartum, especially with high blood pressure, swelling, or visual changes (we need to rule out preeclampsia urgently)
Migraine attacks lasting more than 72 hours despite treatment
Headache with fever, stiff neck, or confusion
A clear monthly pattern that is disabling and not yet evaluated

You don’t have to know whether what you’re feeling is “really a migraine” or whether it warrants medication. That’s what we’re here to sort out with you.