If you have a headache and want to vomit when you have your period, the most common reason is that the endometrium is shed during menstruation, resulting in the release of prostaglandins, due to individual differences, each person has a different degree of sensitivity to prostaglandins, which not only cause contraction of the smooth muscle of the uterus, but also cause contraction of the smooth muscle of the blood vessels, which may cause vasoconstriction of the blood vessels in the brain and produce relatively high intracranial pressure, resulting in vomiting. symptoms. It is recommended to give proper rest and take vitamin B1 and glutamine orally to nourish the neurovascular and relieve the symptoms of headache and vomiting, and if necessary, vitamin B6 to relieve the symptoms of vomiting. It is also recommended to rule out organic lesions, because the resistance is relatively low during menstruation, and clinical manifestations will occur when there are organic lesions.