Menstruation is menstruation, and if you don’t have menstruation but have black discharge, first of all, we should rule out pregnancy-related diseases, such as miscarriage, ectopic pregnancy, and so on. It may also be caused by endocrine disorders. If you don’t have your period, it means that your period exceeds the normal time for menstruation, and if you have had sex, you may be suffering from pregnancy-related diseases, such as miscarriage with precursor, induced abortion, ectopic pregnancy, etc., so you need to go to the hospital to check the blood test for HCG and uterine ultrasound examination. The black discharge indicates that the amount of menstruation is small, there may be endocrine disorders, such as menopausal women, polycystic ovary syndrome patients. Some women who have had multiple abortions and the uterine lining has been damaged may also have low menstrual flow with black discharge. Not menstruating but keep flowing black discharge, this symptom, you need to seek medical attention.