Postmenopausal bleeding is not normal and could be caused by noncancerous polyp growths in the uterus or cervix, thinning of the endometrium tissue that lines the uterus or endometrial hyperplasia, a condition where the uterus lining becomes thick, explains WebMD. Uterine or endometrial cancer can also cause postmenopausal bleeding.
Infections of the cervix or uterus and hormone therapy can cause postmenopausal bleeding, according to WebMD. Women who use blood-thinning medications may also be at risk for bleeding or spotting after menopause. Certain types of cancer cause postmenopausal bleeding as well.
Women who develop polyps inside the cervical canal often notice bleeding after menopause and may experience unexpected bleeding from tissues that line the uterus due to lowered estrogen levels, explains WebMD. Abnormal cells in the uterus, often caused by obesity, can lead to cancer of the uterus lining, which produces bleeding after menopause.
Individuals with postmenopausal bleeding should consult with a physician for an evaluation, according to WebMD. Physicians determine the cause of the bleeding by performing a physical exam and gathering medical history information. In some cases, a physician may order a transvaginal ultrasound to view pelvic organs or an endometrial biopsy to take samples of the uterine lining.