Menstrual migraine starts before or during menstruation and can occur every month. Common symptoms include dull throbbing or throbbing headaches, sensitivity to light, nausea, fatigue, dizziness, and more. There are treatment and prevention options that give good results. A migraine is more than just a bad headache. It is a neurological disorder with a series of symptoms that can include debilitating pain on one side of the head. It is estimated that 70% of people who suffer from migraines are women. Of these women, 60% to 70% report a relationship between their periods and migraine attacks. Women experience migraine attacks three times more often than men. Menstrual migraine is one of several types of migraine headaches. Examples of other migraines include migraine with aura, migraine without aura, and chronic migraine. Estrogen and progesterone are the two main sex hormones in women. Estrogen shapes women’s physical characteristics, induces puberty, and aids reproduction. It also affects cholesterol levels, controls the menstrual cycle, protects bone, heart, skin and brain health. It is mainly produced by the ovaries. Estrogen levels change. They are the highest in the middle of the cycle and the lowest are measured during the menstrual bleeding. When a woman enters menopause, they drop to very low levels. Headaches in women, especially migraines, are associated with changes in estrogen levels. Estrogen levels drop just before the start of the menstrual cycle. Premenstrual migraines regularly occur during or after the female hormones estrogen and progesterone drop to their lowest levels. Migraine attacks usually improve during pregnancy. In some women, migraine attacks appear as early as the first trimester of pregnancy and disappear after delivery. In addition to the drop in estrogen, birth control pills and hormone replacement therapy for menopause can change the frequency and severity of migraine attacks. Source: https://bash.org.uk/downloads/guidelines2019/01_BASHNationalHeadache_Management_SystemforAdults_2019_guideline_versi.pdf https://my.clevelandclinic.org/health/diseases/8260-menstrual-migraines-hormone-headaches https://www.nhs. uk/conditions/hormone-headaches/