Women’s menstruation can end in 3-7 days. Normal women’s menstruation is the shedding and bleeding of the endometrium that accompanies the ovarian cycle, and its cycle and the length of the period are very much related to each woman’s own constitution. Generally, the menstrual cycle is about 28 days and the period lasts for 3-7 days, and it is normal to have an early or late period of about 7 days. If it is more than 7 days, it is abnormal. Clinically, it is mostly seen after multiple abortions, after cesarean section, uterine fibroids, endometritis, pelvic inflammatory disease, etc. If menstruation is spotting, it is called menorrhagia, which is mostly seen in diseases such as polycystic ovary syndrome, hyperprolactinemia and premature ovarian failure. If menstruation does not end for a long time or is dripping, it is called excessive menstruation or avalanche, mostly due to poor ovarian corpus luteum, neuroendocrine dysfunction, abnormal thyroid and adrenal cortex function.