Lastly, it could be a sexually transmitted infection causing this if black blood is accompanied by a burning sensation when peeing, discharge with an unpleasant smell, itching, pain or bleeding during or after sex, pelvic pressure or pain, and spotting between periods
Black blood is concerning if it happens alongside other symptoms or outside your normal timing for a period. For most women, periods last around two days to a week every three to five weeks. Certain conditions might need for you to visit a healthcare provider if it happens during pregnancy, after delivery, or while entering menopause.
It’s also best to get checked if it’s accompanied by abnormal discharge and itching, cramping or pain, and a fever that could indicate an infection.
The treatment for this, if it is required, will depend on the reason once it is ascertained. This means the removal of the object, antibiotics for infections, and other procedures needed to resolve the underlying conditions. If you are unsure about anything, make sure to do your research and reach out to your doctor.
Learn more about menstruation and its impact on health here.