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  • When period blood is brown
  • Brown period blood for a week!

    Brown period blood can sometimes be a cause for concern — here's what to look out for

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    This article was medically reviewed by G.

    Thomas Ruiz, MD, OB/GYN Lead at MemorialCare Orange Coast Medical Center in Fountain Valley, CA.

    • Brown period blood is normal when it's at the beginning or end of your period.
    • But you should see a doctor if you also experience unusual pain, a foul smell, or blood clots.
    • If you have brown blood between your periods, then this could be a sign of PCOS. 

    Period blood isn't always red – it can range from light pink to dark blackish-brown. 

    Brown period blood usually isn't a cause for concern, but if it shows up in between your periods or with other symptoms like a foul smell, this may be a sign of a medical issue. 

    Here's what you need to know about why your period blood is brown and when you need to see a doctor.

    Brown period blood can be normal

    We usually think of blood as bright red, but "blood becomes darker when it has time to oxidize," says Christine Greves, MD, a gynecol

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