Abnormal Bleeding

Abnormal uterine bleeding is when you bleed outside of your normal monthly period. You might hear it called anovulatory bleeding. Your flow could also be heavier or last longer than what’s typical.


When it comes to menstrual cycles, there’s a wide range of “normal.” But your period shouldn’t be a problem for you month after month. If it’s so heavy or unpredictable that it keeps you from doing some activities or makes you miss work or school, you may have a medical condition that should be treated.

  • Abnormal uterine bleeding with heavy menstrual bleeding (AUB/HMB)
  • Abnormal uterine bleeding with bleeding between periods (AUB/IMB)

A variety of things can cause abnormal uterine bleeding. Pregnancy is a common cause. Polyps or fibroids (small and large growths) in the uterus can also cause bleeding. Rarely, a thyroid problem, infection of the cervix, or cancer of the uterus can cause abnormal uterine bleeding.

  • Spotting or bleeding between menstrual periods.
  • Spotting or bleeding after sex.
  • Spotting or bleeding after menopause.
  • Menstrual periods that last longer than seven days.
  • Soaking a tampon or pad in one hour or less during your menstrual period.