WHY DO I GET MIGRAINES BEFORE MY PERIOD?

According to the American Academy of Neurology, nearly one in five adult women get migraines just before their periods. A research was carried out and the results were that migraines do have some oestrogen connection. Part of your period cycle involves oestrogen levels to consistently rise followed by a quick dip as progestrone levels go up. It's during this "oestrogen wothdrawal" that you are most susceptible to a menstrual migraine.