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A 17-year-old female asked:

My periods is usually thick, dark, and heavy from day 1-day 7. i just started my period yesterday and it's bright red and very thin. i'm not sure why?

1 doctor answer2 doctors weighed in
Dr. Donald Alves
Emergency Medicine 26 years experience
Fresh blood: Blood darkens and thickens the longer it is out of vessels--so it suggests that your usual menstrual bleeding has been there for a while versus this time, which had fresh bleeding come out. Nothing to worry about.
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Last updated Nov 14, 2013

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