The uterus bleeds, and for every woman, regular vaginal bleeding once a month, also known as menstruation, is the process of cyclical proliferation, luteinization and finally exfoliation and bleeding of the endometrium that occurs due to cyclic changes in estrogen as well as progesterone secreted by the ovaries. Nowadays, there is a disease called abnormal uterine bleeding. The so-called abnormal uterine bleeding is not the same as regular menstruation, irregular bleeding, this kind of bleeding needs timely treatment, it can occur in adolescence, can also occur in reproductive age, but also often appear in the perimenopausal period, accompanied by a woman’s life.