Abnormal Uterine Bleeding

Abnormal uterine bleeding can occur during your period or in between periods and can be a sign of a variety of gynaecological concerns. Hormone imbalances, such as PCOS or thyroid disorders, are often the cause of abnormal uterine bleeding, but sometimes it can also indicate something more serious.

Symptoms of abnormal uterine bleeding

  • Heavy menstrual bleeding
  • Bleeding at unusual times, such as between periods or after sexual intercourse
  • Unusually long periods that last for 7 days or longer
  • Irregular menstrual cycles

Causes of abnormal uterine bleeding

Hormone imbalances

Some hormonal imbalances, such as PCOS, thyroid disorders and anovulation, can cause abnormal bleeding. Being overweight can also contribute to hormone imbalances.

Structural abnormalities

Growths that form in the inner lining of the uterus, such as polyps, uterine fibroids and cysts, are all common structural abnormalities that can cause abnormal bleeding.

Precancer and Cancer

It’s vital to get checked out if you have experienced abnormal bleeding, as it could indicate vaginal, uterine, cervical or ovarian cancer. Early detection is vital for your chances of treatment.


Some bacterial infections, such as vaginitis and STDs, such as chlamydia and gonorrhoea, can cause abnormal bleeding.

Other medical conditions

Leukaemia, kidney disease, pelvic inflammatory disease and liver disease can all cause abnormal bleeding, and early detection is also vitally important for the best treatment outcomes.