Black coffee can be consumed appropriately during menstruation, but it is not recommended to drink a large amount.
Black coffee contains caffeine, which will excite the nerves after drinking, leading to faster heartbeat and higher blood pressure; caffeine may also promote uterine contraction, thus aggravating menstrual cramps and increasing menstrual blood in women; and if consumed before going to bed, it may also lead to insomnia. The above reactions to coffee have individual differences and vary from person to person.
Women are already weak and emotionally unstable during menstruation, so they should rest and relax at this time. If you drink a lot of black coffee, it will lead to poor rest, which will make your mood agitated and your body more tired.
If women need to drink coffee to refresh themselves during menstruation, they can drink a little bit appropriately. But pay attention not to drink a lot, each drink 100~200ml, pay attention not to drink on an empty stomach and before going to bed.