The reasons for the smooth flow of menstruation are: first, because there is a tight cervical mouth caused by menstruation is not smooth, you can give appropriate motherwort granules orally to promote the contraction of the uterus, so that the relaxation of the cervical mouth, the blood in the uterine cavity will flow out; second, if the posterior position of the uterus causes the flow of menstrual blood is not smooth, you can adopt a lying position to reduce the angle between the uterine cavity and the cervix, which is conducive to the smooth discharge of menstrual blood; third Third, if there is qi stagnation and blood stasis, you can pay attention to proper warmth, drink more hot water and food or give pelvic physical therapy, foot bath, so that the blood circulation of the whole body will be smooth, the pelvic blood circulation will also be smooth, the endometrial peeling will increase, and the menstrual blood flow will become smooth. If women have poor menstrual blood flow during menstruation, they should take corresponding treatment measures according to different causes, and the effect will be better.