Motherwort has the effect of regulating menstruation and activating blood circulation to remove blood stasis. If the prolonged menstruation is caused by blood stasis, drinking motherwort can make the stagnant blood discharged quickly, which can make the menstruation end earlier. However, if the prolonged menstruation is caused by insufficient qi and blood due to blood deficiency, it is wrong to use motherwort, as it will aggravate bleeding and prolong the bleeding time. Therefore, if the menstruation does not end for a long time, one should not drink this medicine casually, but must go to the hospital and use a traditional Chinese medicine doctor to analyze the evidence before determining whether or not to apply motherwort.