Heavy Bleeding

Doctors define menstrual bleeding as heavy (and call it menorrhagia) when periods last longer than seven days or more than 80ml of blood is lost during a period. It is possible to measure menstrual blood loss and doctors can have this done by their local hospital departments, especially if there is concern about a woman becoming anaemic. However, the way that a woman perceives the heaviness of her period is as important as any clinical measurements

Clots

When menstrual bleeding is heavy, clotting can also occur. Losing large clots can be extremely upsetting and even painful if they are large because they can cause cramping as they pass through the cervix. There is a simple explanation as to why these large clots are formed. All blood contains a clotting factor. To enable menstrual blood to flow freely from the uterus (womb) and leave your body without clotting, the uterus produces an anti-clotting agent. But if the menstrual loss is heavy, it is possible that the anti-clotting agent will be used up before a period has finished, so that the remaining blood is likely to form clots.

What causes heavy bleeding?

If your periods have changed, it's very important to see your doctor. There are a number of diseases which can cause heavy bleeding (see list below). The doctor will investigate possible causes and offer the appropriate treatment. But in about half the women with heavy bleeding, no cause can be found.

Some causes of heavy menstrual bleeding

If your periods have changed, it's very important to see your doctor. There are a number of diseases which can cause heavy bleeding (see list below). The doctor will investigate possible causes and offer the appropriate treatment. But in about half the women with heavy bleeding, no cause can be found.

• Unexplained - for half of all cases no cause can be found.
• Contraceptive coil (IUD) - the coil can cause heavier, longer periods.
• Injectable contraception (Depo Provera) - can cause heavy or prolonged bleeding.
• Pelvic disorders:
• Fibroids - these benign (not cancerous) growths in the muscular wall of the uterus are a common cause of heavy bleeding.
• Polyps - these benign growths of the lining of the uterus may cause heavy bleeding but more commonly lead to spotting between or after periods.
• Pelvic inflammatory disease - an infection in the reproductive tract which can cause infertility and chronic pain if untreated.
• Endometriosis - a painful condition in which the lining of the uterus grows outside the uterus.
• Endometrial hyperplasia - thickening of the lining of the uterus, leading to heavier bleeding.
• Endometrial cancer - cancer of the lining of the uterus, causing heavy periods, bleeding between periods and blood-stained vaginal discharge. Rare, but more common in women after the menopause.
• Blood and hormonal conditions:
• Hormone imbalances - can stop ovulation (egg release) leading to build-up of endometrium and heavier periods.
• Hypothyroidism - an underactive thyroid gland can cause heavier periods.
• Blood clotting disorders.
• Use of anticoagulant drugs.

Simple, non surgical method of treating heavy menses is to insert a hormonal intrauterine device (LNG _ IUD). This is a small shaped ‘T’device, which looks like a Copper T or loop but has hormone inside it. This can be placed inside the uterus in two minutes, without any anaesthesia and once inside the womb, it reduces or stops bleeding during menses for a period of 5 years. This also gives contraceptive benefit to women. This is a temporary method and the device can be removed at any time.