During menstruation, it is not normal to have a black blood clot. This is because normal menstrual blood is usually dark red and liquid in color. If a blood clot appears later, it may be caused by cold in the uterus, gynecological inflammation or endocrine disorders, or ovarian lesions. If the blood clots are not particularly abundant during menstruation and there are no uncomfortable symptoms, they are formed after the natural shedding of the endometrium and usually do not require special treatment. As long as you avoid getting cold, eating cold drinks and touching iced water during menstruation, the formation of blood clots will not usually be aggravated. If there are more black blood clots during menstruation, accompanied by abdominal pain, you can take oral blood-boosting drugs under the guidance of a doctor to regulate the body to promote the discharge of menstrual blood, and before and after the menstruation with hot water bags hot compresses on the abdominal area, can relieve menstrual pain, and also help to reduce the clots.