Normal menstrual cycle is 28±7 days. Taking medicines for activating blood circulation and removing blood stasis (promoting blood circulation and eliminating blood stasis in the body) and then having the menstrual cycle more than 7 days earlier or irregular bleeding is abnormal, and it has nothing to do with the time of taking the medicines. In general, medicines for activating blood circulation and removing blood stasis, such as safflower, peach kernel, yujin, turmeric, etc. are mainly targeted at diseases caused by stagnation of blood circulation, such as irregular menstruation, dysmenorrhea, amenorrhea, and so on. After taking medicines to promote blood circulation and eliminate stasis in the above diseases, if women’s menstrual cycle returns to about 28 days, it is a sign of improvement of the disease; however, if the menstrual cycle is advanced or irregular bleeding occurs after taking medicines to promote blood circulation and eliminate stasis, it is an abnormal manifestation, and the medicines should be stopped and medical consultation should be made in a timely manner. After the discomfort occurs, you should consult a doctor in time and choose the medication under the guidance of physician’s diagnosis, do not use the medication on your own, so as not to delay the condition.