If the menstruation has lasted for half a month, it is clinically abnormal, because most normal menstruation clears in 3-7 days. It is recommended to have a gynecological examination to understand the site of bleeding, mainly to find out whether there are abnormal abnormalities in the vaginal and cervical mucosa. If necessary, screening for cervical cancer can be done. It is also recommended to do a gynecological double examination to find out whether there is inflammation in the pelvis and whether there are tumors. Ultrasound is also recommended to check the condition of the endometrial lining of the uterus. If the endometrium is abnormally thickened or unevenly echogenic after about half a month of continuous vaginal bleeding, diagnostic scraping can be done and the scraped tissue will be sent for pathological examination to determine the pathological diagnosis.