AUB, or abnormal uterine bleeding, is relatively common in obstetrics and gynecology, with about one-third of gynecological patients seeking treatment for irregular menstruation. The etiology of the disease is complex, and sometimes it is difficult to find the exact cause. Abnormal uterine bleeding can be divided into organic and non-organic abnormal uterine bleeding. Abnormal uterine bleeding caused by organic lesions includes endometrial or cervical polyps, adenomyosis, fibroids, malignant tumors and endometrial hyperplasia, and the clinical features can be manifested as excessive menstruation and spotting bleeding in between menstruation, and most of the ovulation is normal. Abnormal uterine bleeding caused by non-organic pathologies include: coagulation abnormalities (e.g., platelet abnormalities or leukemia), ovulation disorders (puberty, perimenopause, obesity, polycystic ovary syndrome, thyroid disorders, and hyperprolactinemia), and endometrial pathologies (e.g., inflammation, infections, and vascular malformations).