Many women have headaches and dizziness during menstruation for the following reasons: 1, the sudden drop of estrogen in the body during menstruation, the release of a large amount of prostaglandins in the blood will cause vasoconstriction, diastolic dysfunction, more sensitive women will have headaches and dizziness during menstruation, with the clean menstruation, the blood estrogen will gradually return to a normal state, the symptoms of headaches and dizziness will also ease or disappear; 2, chronic anemia, due to A large amount of blood flows out during menstruation, which can seriously lead to blood loss anemia, the head will be lack of blood and oxygen, thus appearing dizziness and headache; 3, itself suffering from other diseases, such as neurasthenia, migraine, hypertension, low blood sugar may cause headache and dizziness. Cerebral neurasthenia, migraine due to poor sleep, menstruation will aggravate, making headache and dizziness. Some patients with hypertension are more obvious during menstruation due to frequent mental tension and anxiety, leading to headaches and dizziness. Women with low blood sugar normally also aggravate during menstruation, with headaches and dizziness, all need to pay attention to rest, self-adjustment and stress relief during menstruation, and seek timely medical attention if necessary.