Most of the drowsiness during menstruation is related to the decrease of immunity during menstruation, you need to pay attention to rest, do not overwork, do not engage in heavy physical activities or strenuous exercise. Pay attention to hygiene, don’t take a bath, abstain from sex, pay attention to diet, avoid eating cold, spicy and stimulating food, drugs and food with blood activating effect, such as ginseng, alcohol, etc., to avoid excessive menstruation and prolonged periods. The normal menstrual volume is 5-80ml. If the menstrual volume is too much, it may cause blood loss anemia, which may lead to weakness, drowsiness, chest tightness and panic. If there is no abnormality in coagulation and ultrasound, you need to regulate your menstruation with medication under the guidance of the doctor to reduce the volume of menstruation and improve the symptoms. If none of the test results are significantly abnormal, no special treatment is needed for malaise and increased sleep during menstruation.