Patient's question:
On the last day of the menstrual period, many black substances may appear. But they disappear after a few days.Doctor's answer:
Normal menstruation is usually dark red. When menstrual blood stays in the uterus for too long, it can turn dark red or even black, which is caused by poor blood circulation. To address dark menstrual blood, it's important to identify the root cause and then treat accordingly.1. Poor uterine contraction ability:
The detached endometrium and menstrual blood are expelled from the body under the pressure of the uterus. When the uterus contracts, it compresses the menstrual blood to exit the body. If the uterus has poor contraction ability, the menstrual blood may not flow out easily, leading to prolonged retention in the body and turning black.
2. Retroverted uterus:
In women with a retroverted uterus, the position of the uterus causes the cervix to be higher than the uterus. This prevents the menstrual blood from flowing out smoothly, resulting in prolonged accumulation in the uterus, which can turn dark red or black.
3. Cold body constitution:
Individuals with a cold body constitution often have slow blood circulation. Due to the cold, the menstrual blood may congeal, leading to dark or deep black blood clots.