It is not normal for your period to be black blood. Normal menstruation is dark red in color, non-clotting and odorless. If the menstruation is black blood, it is an abnormal condition, which usually indicates a low amount of menstrual blood and a long time of stagnation in the uterine cavity and needs to be taken seriously. Most menstrual periods with black blood are caused by poor discharge of menstrual blood due to cold in the body. Patients are often accompanied by pain in the lower abdomen. Patients are generally advised to drink brown sugar water in moderation or take oral motherwort capsules to improve the color of menstrual blood. If their symptoms are not relieved for a long time, they should promptly visit a gynecologist for ultrasound examination to observe whether there are abnormal masses in the pelvis and whether there is gynecological inflammation that causes menstrual blood to be stagnant in the uterus. If the menstruation is black blood due to disease, timely treatment should be carried out according to the doctor’s advice. Women are advised to keep warm during menstruation, avoid getting cold, and avoid eating cold or spicy stimulating foods.