There are more reasons for having black blood in the uterus, which may be caused by uterine cavity adhesion, endometritis, incomplete uterine restoration after delivery and so on.
1. Uterine cavity adhesion: If the uterine cavity is operated or the uterine lining is damaged after several abortions, it may cause uterine cavity adhesion, and the symptom of dark blood in the uterus may appear.
2. Endometritis: it is mostly due to the invasion of bacteria and other pathogens into the endometrium, causing the endometrium to fall off, and the blood can not be discharged in time and remain in the uterus, which may lead to black blood in the uterus.
3. Inadequate postpartum uterine recuperation: It may be due to the fact that after giving birth, a woman is overworked, which leads to poor uterine recuperation and reopening of the blood sinuses, resulting in uterine bleeding. If the blood is not able to be discharged in time and stays in the uterus for a long time, there may also be black blood in the uterus.
There may also be other causes of black blood in the uterus, so it is recommended to consult a doctor in time, complete the relevant examinations, and carry out standardized treatment after making a clear diagnosis under the guidance of a professional doctor.