If there is no contraindication to surgery, the bleeding can usually be stopped by scraping, but not all bleeding can be stopped by scraping. Curettage is a small procedure commonly used in obstetrics and gynecology, refers to the use of instruments to scrape the contents of the uterine cavity, not only can achieve the purpose of hemostasis and treatment, the contents of the uterine cavity will be sent to the pathological examination, but also can be used for the diagnosis of diseases. Curettage can not only be used for abnormal uterine bleeding to exclude endometrial pathology, but also according to the pathological pattern of the endometrium to determine the presence or absence of ovulation, as well as abortion incomplete uterine cavity with tissue residues and so on. However, scraping can not be used in patients with inflammation of the reproductive tract, therefore, the relevant examinations should be perfected before the operation. There are many reasons for irregular menstruation, such as endometrial polyps, uterine scar diverticulum after cesarean section, taking contraceptives, etc. Not all irregular menstruation requires curettage, therefore, if you have irregular menstruation, you need to go to a regular clinic, clarify the cause of the disease, and then follow the doctor’s instructions for treatment.