Migraine may occur before menstruation, and it is usually a throbbing headache on one side of the body, which may be related to the fluctuation of hormone level in women’s body, and may also be related to personal constitution. 1. Hormone fluctuation: Before menstruation, the concentration of estradiol in serum decreases, which may cause the change of blood vessel tension, and some patients who are sensitive to this may have migraine; estrogen may directly or indirectly stimulate the secretion of prostaglandin, which acts on the blood vessels in the brain, and may cause migraine. Prostaglandins may directly or indirectly stimulate the secretion of prostaglandins, which act on the blood vessels in the brain and cause vasoconstriction and dilation, resulting in migraine headache, which will generally be relieved by itself after menstruation. If the headache is obvious, you can use pain-relieving drugs for symptomatic treatment. You can increase the intake of calcium and magnesium in your diet, such as eating more green vegetables, pods, whole grains, rice, etc., which can help prevent migraine; meanwhile, you should avoid eating chocolate and drinking caffeinated drinks such as coffee, cola and tea before your menstrual period to avoid triggering migraine attacks.