Abnormal bleeding can ruin your favorite pair of underwear. It can also be a cause for concern about your health. Fortunately, your gynecologist can help. Here are five things your gynecologist may do to treat abnormal bleeding: 1. Hysteroscopy And Biopsy Before your gynecologist can treat your abnormal bleeding, they must first diagnose the cause of your bleeding. Bleeding may be caused by pregnancy, hormone imbalances, or certain types of cancers.