There are more reasons for headaches during menstruation, and the most common factors are menstrual syndrome, massive menstrual blood loss and migraine. 1. Menstrual syndrome: During premenstrual period and menstruation, due to the influence of estrogen and progesterone, women are prone to headache, dizziness and other symptoms of menstrual syndrome, which generally do not require special treatment and will be relieved by themselves after menstruation. 2. Large amount of menstrual blood loss: some women are usually weak, during menstruation due to the large amount of menstrual blood loss, it is easy to aggravate the body’s lack of oxygen, lack of blood, which can lead to anemia, and therefore headache, dizziness, bloating, nausea and body fatigue and other symptoms will occur. 3. Migraine: Some migraine attacks are related to the changes of hormone levels in the body, so every time you have your period, you can induce migraine attacks and headache symptoms. If menstrual headache occurs for a long time, you should consult a doctor in time and take active treatment under the doctor’s guidance.