Period blood: Black blood is blood that has been exposed to oxygen or old blood and brown blood is old blood. These do not have clinical significance and should not be concerning.
Answered 4/8/2015
3k views
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.
Ask your question