High blood pressure during menstruation is usually caused by mental tension or mental anxiety. Blood pressure is greatly affected by neuroregulation, and emotional stress or anxiety can cause a temporary increase in blood pressure, but the increase in blood pressure due to abnormal neuroregulation is usually mild, and usually does not exceed grade 2 hypertension. If a young woman has normal blood pressure but finds it high during menstruation, she should look for the cause. It may be due to emotional anxiety caused by menstrual cramps or emotional stress and poor sleep caused by menstruation.