Delayed menstruation with black discharge may be caused by irregular menstruation, uterine cavity infection, endometrial injury or malignant tumors, etc. It may also be related to pregnancy-related diseases.
1. Irregular menstruation: it may be affected by mental and emotional factors, resulting in low estrogen levels in the body, endocrine disorders, which leads to longer bleeding time of the last menstruation or irregular vaginal bleeding, which manifests itself as dark brown discharge.
2. Endometritis: In endometritis, the endometrium is congested and edematous with inflammatory exudates and blood stains, and the surface of the endometrium in severe inflammation may have purulent exudates, and the endometrium is necrotic and detached, forming ulcers. So endometritis may also lead to delayed menstrual periods and black discharge.
3. Endometrial damage: may be due to repeated uterine operations or repeated abortion, resulting in damage to the uterine cavity can cause menstrual disorders, delayed menstruation, irregular bleeding and other symptoms, can also be manifested as a black-brown discharge.
4. Malignant tumors: malignant tumors of vagina, cervix and endometrium, when the tumor tissue proliferates, necrotic, oozing and bleeding, it can lead to delayed menstruation and black vaginal secretion, often accompanied by bad smell and blood.
5. Pregnancy-related diseases: If you are a woman of childbearing age, delayed menstruation with black discharge needs to be alerted to pregnancy-related diseases such as preeclampsia and ectopic pregnancy.
The black discharge of delayed menstruation may also be caused by other reasons, and should be timely to the hospital to identify the cause of targeted treatment.