If the menstrual flow is low, it should be regulated by diet first, such as eating estrogen-containing foods, such as fresh soy milk, onions, black beans, peanut butter and red wine, as well as royal jelly and clams, which contain phytoestrogens or animal estrogens, which can help to increase the menstrual flow. If there is no improvement in menstrual flow after dietary modification, oral motherwort capsules can be taken, as motherwort capsules are used clinically to treat dysmenorrhea as well as decreased menstrual flow. If there is still no improvement, it is recommended to take a blood test for sex hormone six on the second or third day of menstruation, mainly to rule out premature ovarian failure caused by decreased menstrual flow. In addition, if there is a history of abortion or uterus removal surgery, it is necessary to exclude the decrease in menstrual flow caused by uterine adhesion.