The first is the inflammation of the endometrium, which leads to the shedding of large pieces of endometrium and makes the menstrual blood form clots. It is recommended to actively give anti-inflammatory treatment, clinically you can take oral metronidazole for one week continuously, which can effectively treat endometrial inflammation in the clinic. In addition, if the menstrual period appears large clots, but also with the position of the uterus, such as forward-flexed uterus and backward-flexed uterus, in the time of menstruation, menstrual blood flow is not smooth, menstrual blood in the uterine cavity stasis, resulting in the phenomenon of blood fast, it is recommended that you can change the position to alleviate this situation, backward-flexed uterus can choose the attached position, and in the time of menstruation, you can drink a bowl of hot The brown sugar water can also make the menstrual blood flow smoothly, you can also do the lower abdomen hot compress.