The signs of menorrhagia are heavy or prolonged vaginal bleeding. Excessively heavy bleeding is defined as when a woman soaks through her sanitary products (i.e., her tampon or pad) enough to require changing them every hour. Bleeding is considered prolonged when a period lasts longer than seven days.
Other symptoms of menorrhagia include spotting or bleeding between menstrual periods and spotting or bleeding during pregnancy. Anemia, a condition is which the body does not have enough red blood cells and the individual feels weak or tired, may also be a symptom of menorrhagia.