It is possible to drink motherwort granules during menstruation, because when menstruation comes, the endometrium sheds quickly, which may cause contraction of the uterus, resulting in abdominal pain, and drinking motherwort granules can relieve the painful menstruation. You can also drink motherwort granules when there is slow shedding of the endometrium and even dark brown discharge, because motherwort helps to activate blood circulation and remove blood stasis, which can help the endometrium shed quickly, thus increasing menstrual flow. When there is irregular menstrual cycle, you can also drink motherwort granules because they have the effect of regulating menstrual cycle, which will take a longer time to be taken orally, requiring about 7-10 days of cycle for oral observation and regulating menstrual cycle.