What could cause vaginal discharge and light bleeding in a post menopausal woman aged 57?

Time to see doctor: After menopause, vaginal bleeding is called post-menopausal bleeding. Endometrial atrophy may be the cause... the tissue that lines the uterus can become very thin after menopause and lead to bleeding. Cancer may also be the cause... postmenopausal bleeding is a common symptom of endometrial cancer, but can be caused by cervical or vulvar cancer.