Dizziness and nausea when you have your period is a manifestation of menstrual syndrome, which is related to the fluctuation of hormone secretion during menstruation, when the estrogen and progesterone secretion in the body decreases and prostaglandin secretion increases. During menstruation, the entire pelvic cavity is congested, so some women may experience menstrual syndrome. The manifestations of menstrual syndrome are more varied, including headache, dizziness, nausea, weakness, and some women may experience lower abdominal discomfort, lower abdominal pain or lower abdominal swelling, and some may experience diarrhea. In the above cases, if the symptoms are mild, no medication is necessary. If the symptoms are so severe that the patient can hardly tolerate them and they even affect work and life, you can give some drugs that nourish the plant nerves, such as vitamins or corresponding pain medications, such as fenpropathrin and naproxen. If the symptoms are still not relieved, it is important to go to the hospital to rule out other diseases.