Black blood during periods occurs due to blood oxidation. In most cases, black blood is seen at the beginning of the menstrual cycle. Blood oxidation means when hemoglobin, iron, and oxygen are mixed in the blood, and the color of the blood changes to black. If the black blood is very low, it is normal, but if it is a high amount, it can be due to hormonal imbalance.
Black Blood - Causes, Diagnosis, and Treatment.
Period blood can appear in a range of colors; one among them is black blood. Read this article to know more.
