Dysfunctional uterine bleeding, hereinafter referred to as dysfunctional uterine bleeding, is abnormal uterine bleeding caused by dysfunction of the reproductive endocrine axis, and is a common female reproductive endocrine disease, which is classified into two major categories: anovulatory type and ovulatory type. Anovulatory type of dysmenorrhea is most common in adolescent and menopausal women, patients may have many different clinical manifestations, the most common is irregular uterine bleeding, manifested as menstrual cycle disorders, menstrual period length varies, menstrual flow is variable or increased, or even heavy bleeding, bleeding period usually no abdominal pain or other discomfort, if the patient bleeding large amounts or bleeding time is long, it may be followed by anemia, and if a large amount of bleeding may lead to shock. The cycle of normal menstruation is 21-35 days, the menstrual period lasts for 2-7 days, and the average blood loss is 20-60 ml, while patients with anovulatory type of uterine bleeding can be classified into 4 types according to their bleeding characteristics: (1) Excessive menstruation: the cycle is regular, the menstrual period is prolonged or the menstrual flow is excessive; (2) Irregular uterine bleeding is excessive: the cycle is irregular, the menstrual period is prolonged, and the menstrual flow is excessive; (3) Irregular cycle, the menstrual period is prolonged but the menstrual flow is normal. (3) Irregular uterine bleeding: irregular cycle, prolonged menstrual period and normal menstrual flow; (4) Frequent menstruation: frequent menstruation, shortened cycle, <21 days. Ovulatory dysmenorrhea is most common in women of childbearing age, and the symptoms can be divided into two categories: (1) Excessive menstruation, which is characterized by regular menstrual cycles, normal menstrual periods, but increased menstrual flow. (2) Bleeding between menstrual cycles, which is characterized by shortened menstrual cycles in some patients and bleeding in the middle of two menstrual cycles, i.e., ovulatory bleeding, in some patients. To summarize, the symptoms of dysfunctional uterine bleeding mainly manifest as irregular uterine bleeding, i.e. menstrual disorders, which are mostly seen in puberty and menopausal transition.