Old blood

What does "Old blood" mean in a report or doctor's letter? In our medical dictionary, you will find a patient-friendly explanation of the meaning of this medical term.

Explanation

"Old blood" in a medical context refers to blood that has been in the body for a while before being expelled or noticed. It often appears dark brown or black, unlike fresh blood which is bright red. This term is commonly used to describe certain types of bleeding, such as from the nose or gums, or in women's menstrual cycles. It's called "old" because it has been exposed to oxygen for a longer period, causing it to darken.

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