What causes HMB?

What causes HMB?

For up to 60% of women with HMB, there is no obvious cause. However, some conditions have been linked to HMB, including:

Polycystic ovary syndrome (PCOS)

A common condition caused by an imbalance of reproductive hormones that affects how a woman’s ovaries work

Pelvic inflammatory disease (PID)

An infection in the upper genital tract (the womb, fallopian tubes or ovaries) that can cause pelvic or abdominal pain and bleeding after sex or between periods


Non-cancerous growths that develop in or around the womb


When small pieces of the womb lining are found outside the womb, such as in the fallopian tubes, ovaries, bladder or vagina


An underactive thyroid, where the thyroid gland doesn't produce enough hormones, causing tiredness, weight gain and feelings of depression

Cervical or endometrial polyps

Non-cancerous growths in the lining of the womb or cervix (neck of the womb)

Blood clotting disorders
Cancer of the womb
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It is important to note that, whether or not a direct cause can be found, HMB is usually a highly treatable condition and there are choices available for you to discuss with your GP.

What to expect from your GP appointment. A few points to help you prepare for your consultation.

Reporting of side effects and quality complaints


If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in the package leaflet. You can also report side effects directly via the Yellow Card Scheme at www.mhra.gov.uk/yellowcard.


You can also report side effects and quality complaints to Bayer Plc. Further information is available on the “contact” tab at www.bayer.co.uk.


By reporting side effects you can help provide more information on the safety of this medicine.