Menorrhagia is menstrual bleeding that lasts more than 7 days. It can also be bleeding that is very heavy. How do you know if you have heavy bleeding? If you need to change your tampon or pad after less than 2 hours or you pass clots the size of a quarter or larger, that is heavy bleeding. If you have this type of bleeding, you should see a doctor. Untreated heavy or prolonged bleeding can stop you from living your life to the fullest. It also can cause anemia. Anemia is a common blood problem that can leave you feeling tired or weak. If you have a bleeding problem, it could lead to other health problems.

Causes of heavy menstrual bleeding
Possible causes fall into the following three areas:
-- Thrombocytopenia
-- Uterine-related problems
-- Growths or tumors of the uterus that are not cancer; these can be called uterine fibroids or polyps.
-- Cancer of the uterus or cervix.
-- Certain types of birth control-for example, an intrauterine device (IUD).
-- Hormone-related problems

Signs of heavy menstrual bleeding
You might have menorrhagia if you:
-- Have a menstrual flow that soaks through one or more pads or tampons every hour for several hours in a row.
-- Need to double up on pads to control your menstrual flow.
-- Need to change pads or tampons during the night.
-- Have menstrual periods lasting more than 7 days.
-- Have a menstrual flow with blood clots the size of a quarter or larger.
-- Have a heavy menstrual flow that keeps you from doing the things you would do normally.
-- Have constant pain in the lower part of the stomach during your periods.
-- Are tired, lack energy, or are short of breath.