Low back pain accompanied by vaginal bleeding is considered to be gravida aura, miscarriage, ectopic pregnancy, should go to the hospital in time for ultrasound and blood test to diagnose the cause of the aura of miscarriage, and timely treatment of birth control to avoid the danger. Lumbago with vaginal bleeding is related to ovulation bleeding. Ovulation bleeding occurs about 14 days before menstruation, and the bleeding is small and can last for 2-3 days, which is normal and no need to worry too much. Back pain and vaginal bleeding is related to gynecological diseases, if there are vaginal lesions, cervical lesions, uterine lesions will appear when vaginal bleeding, such as endometrial polyps, cervical polyps, uterine fibroids, vaginal inflammation, etc. Ultrasound, gynecological examination, routine examination of leukorrhea can be carried out. If you suffer from gynecological inflammation, you should treat it in time to avoid delay.