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Joint Base Lewis-McChord, WA
A 25-year-old female asked:

Dark brown blood first two days of period, then bright red with very large clots. what is going on? this is every month.

1 doctor answer8 doctors weighed in
Dr. Gayle Valeros
Family Medicine 25 years experience
This can be common: It is not uncommon to have dark brown blood at the beginning of a period b/c this is usually old blood/tissue. Once the period gets going and the uterine lining is shed, the blood will look brighter and have larger clots. If this is a change in your period, then speak with your doctor as to the cause of this change. Sometimes periods are too heavy and cause anemia due to the excess blood loss.

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Last updated Sep 6, 2018

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