Aunt i.e. menstruation, you can drink a small amount of black coffee during your aunt, especially for those who drink coffee every day with little effect, but usually if you seldom drink coffee or drinking coffee affects your sleep, do not drink it in this case. Black coffee belongs to the original coffee, without any additives, mellow flavor, contains more caffeine, has a refreshing effect, a small amount of menstrual period to help relax the body and mind. However, if you drink black coffee in excess, it may lead to sleep disorders. Some women are prone to mood swings during menstruation and are prone to symptoms such as irritability and anxiety, which can be exacerbated by poor sleep. Menstruation itself is less resistant, so during menstruation also pay attention to not eat cold and spicy and stimulating food, to ensure adequate sleep.