Metrorrhagia is defined as irregular, acyclic vaginal bleeding that occurs outside of the normal menstrual period. There are several potential causes of metrorrhagia, including disorders like dysfunctional uterine bleeding, fibroids, polyps, and infections. A doctor will take a patient's medical history and conduct a physical exam to diagnose the cause. Tests like ultrasounds, blood tests, and biopsies may also be used. Treatment depends on the underlying cause but can include lifestyle changes, hormone therapy, surgery to remove growths, or treating any other related medical conditions.