Most of the vaginal bleeding is uterine, but bleeding can occur in women with lesions anywhere in the reproductive tract. Heavy or prolonged menstrual periods with essentially normal cycles are typical of uterine fibroids; however, this type of bleeding can also be seen in adenomyosis, ovulatory dysfunctional uterine bleeding, and after placement of an intrauterine device. Irregular vaginal bleeding is most often anovulatory dysfunctional uterine bleeding, but it should be noted that early endometrial cancer can also have this type of uterine bleeding in women in the transition to menopause. Long-term persistent vaginal bleeding without any recognizable cycle is often the result of malignant reproductive tract tumors, and cervical and endometrial cancers should be considered first, especially in the older age group. Postmenopausal vaginal bleeding occurs in women of childbearing age, and pregnancy-related disorders such as miscarriage, ectopic pregnancy, and trophoblastic disorders including hyperemesis gravidarum should generally be considered first. Dysfunctional uterine bleeding is most common in perimenopausal women, but malignant tumors of the reproductive tract should be the first to be excluded. Ovarian endocrine dysfunction is most common, and all are uterine bleeding. There are two categories: anovulatory dysfunctional uterine bleeding (most common in adolescent girls and women in transition to menopause) and ovulatory dysfunctional uterine bleeding. If you experience this symptom, you should go to the hospital in time to confirm the diagnosis and timely treatment.