Black discharge on the 9th day of menstruation may be caused by uterine fibroids, uterine adenomyosis, endometrial cancer, as well as uterine incision diverticulum and other etiologies.
1. Uterine fibroids: the cause of uterine fibroids is still unclear, and it is considered to be related to heredity and abnormal hormone levels in the body. Patients will have long duration of each menstruation, heavy menstruation and other manifestations, so patients will have the symptom of black discharge on the 9th day of menstruation.
2. Uterine Fibromyalgia: The cause of Uterine Fibromyalgia is still unclear, and it may be related to factors such as uterine operation and endometritis. Patients may have increased menstrual flow, prolonged menstrual period, dysmenorrhea, etc. Therefore, patients may have the symptom of black discharge on the 9th day of menstruation.
3. Endometrial cancer: endometrial cancer is mainly caused by excessive stimulation of estrogen, and patients will have symptoms such as endless menstruation, heavy vaginal bleeding, bloody or plasma vaginal discharge, etc., thus patients will have black discharge on the 9th day of menstruation.
4. Others: patients with uterine incision diverticulum, cervical polyps, luteal insufficiency and other lesions will also have the symptom of black discharge on the 9th day of menstruation.
There may be other reasons for the black discharge on the 9th day of menstruation, so it is recommended to consult a doctor for a clear diagnosis, and the doctor will take appropriate measures to treat the cause of the problem.