Abnormal uterine bleeding is defined as abnormal bleeding originating from the uterine cavity with a change in any 1 of the normal menstrual cycle frequency, regularity, length, or amount of menstrual bleeding. Abnormal uterine bleeding is categorized into two main types according to its etiology, i.e., the presence of structural changes and the absence of structural changes in the uterus, and there are 9 types in total.
Abnormal uterine bleeding is divided into 9 types according to the etiology: (1) endometrial polyps; (2) adenomyosis; (3) uterine smooth muscle tumors; (4) endometrial malignancy and atypical hyperplasia; (5) systemic coagulation-related diseases; (6) the presence of ovulation disorders associated with uterine bleeding; (7) uterine bleeding due to endometrial abnormalities; (8) uterine bleeding due to medical causes; (9) abnormal uterine bleeding is not categorized. Among them, ① ③ ② ④ have structural changes, ⑤ ⑥ ⑦ ⑧ ⑨ have no structural changes of the uterus.
Clinical causes of abnormal uterine bleeding can be a single factor or a combination of factors.
It is recommended that women who have abnormal uterine bleeding should go to the hospital in time to clarify the cause of the disease and to diagnose and treat the cause of the disease.