Increased menstruation caused by taking Chinese medicines may be due to taking Chinese medicines that invigorate blood circulation and eliminate blood stasis during or before menstruation, which leads to increased menstrual flow. Increased menstrual flow will occur if Chinese medicines that invigorate blood circulation and remove blood stasis are taken during or before menstruation. Therefore, it is generally recommended to avoid taking herbs that activate blood circulation and remove blood stasis, such as Salvia miltiorrhiza, peach kernel, and chickweed, before or during menstruation to avoid affecting menstruation. It should also be noted that the increase in menstrual flow is usually compared with the previous menstrual flow, which varies from individual to individual. If the amount of menstruation becomes heavier or the menstrual cycle becomes longer compared to the past, then it is considered increased menstrual flow. It is recommended that when taking medication for a medical condition, if you are menstruating, you should communicate with your primary care physician to make adjustments to your herbal medication. It should also be noted that Chinese medicines or proprietary Chinese medicines need to be used under the guidance of a Chinese medicine practitioner’s diagnosis, and should not be used privately, so as not to cause damage to the organism.