Vaginal bleeding should do the following kinds of examination: first, blood HCG test, ultrasound: if it is a woman of childbearing age, first of all, we should rule out ectopic pregnancy, blood HCG test to see if it is normal. If the blood HCG is elevated, ultrasound should be done to further exclude whether it is ectopic pregnancy. Secondly, sex hormone six test and so on: if it is an adolescent female, it is necessary to check the sex hormone six test and ultrasound to see if the vaginal bleeding is caused by ovulation abnormality, and to do ultrasound to see if there are any diseases of the endometrium and ovary, and so on. Thirdly, cervical cancer screening and other tests: If women are menopausal, they should do cervical cancer screening and endometrial examination to see if the vaginal bleeding is caused by cervical lesions or endometrial abnormalities. In addition, women of childbearing age should also pay attention to vaginal bleeding caused by abnormal ovulation and endometrial polyps.