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    What causes spotting? The lowdown on bleeding between periods

    Updated 30 January 2024 |
    Published 29 August 2018
    Fact Checked
    Medically reviewed by Dr. Renita White, Obstetrician and gynecologist, Georgia Obstetrics and Gynecology, Georgia, US
    Written by Helen Massey
    Flo Fact-Checking Standards

    Every piece of content at Flo Health adheres to the highest editorial standards for language, style, and medical accuracy. To learn what we do to deliver the best health and lifestyle insights to you, check out our content review principles.

    Many of us will experience bleeding between our periods at some point, but is it normal, and what causes it? Here’s what you should know.

    Seeing blood in your underwear when you’re not due for your period can be unsettling, but it’s actually more common than you might think.

    Around a third of women will experience what’s known as abnormal uterine bleeding, which includes light bleeding or spotting outside of the normal period that may not be heavy enough to need a tampon or pad. There are many possible causes.

    So what is spotting? And when should you speak to your doctor about it? We asked an obstetrician and gynecologist (OB-GYN).

    Remember: You know your body best, so it’s always worth getting any vaginal bleeding checked out if you have any concerns.