Heavy menstrual bleeding or irregular bleeding

Heavy periods can have causes that aren't due to underlying disease. Examples include regular variation among individuals, hormonal imbalance, IUD use or medication side effects.

Vaginal bleeding between periods is one symptom of abnormal uterine bleeding. Having extremely heavy bleeding during your period can also be considered abnormal uterine bleeding. Very heavy bleeding during a period and/or bleeding that lasts more than 7 days is called menorrhagia