If the menstrual period has not been clean for 20 days, clinical attention must be paid to the following examinations: 1, gynecological examination to understand the specific location of the bleeding, and to understand the cervix-vagina whether there is a cervical organism, and if necessary, need to do cervical cancer screening. 2, ultrasound is recommended, to understand the uterine cavity whether there is an abnormal echogenic mass, or the endometrium in the case of vaginal bleeding, has been thickened. If the endometrium is thickened in the presence of vaginal bleeding, it is recommended that a diagnostic curettage be performed and pathology tests sent for further diagnosis.3. Clinically, it is recommended that vaginal bleeding caused by incomplete abortion be ruled out, and blood can be drawn to check the blood HCG. If the blood HCG is still elevated, it is possible that incomplete abortion may have caused the irregularities in menstruation.