There are blood clots and blood sludge inside the menstrual period is not normal for the following reasons: First, normal women’s menstrual blood is bright red in color without blood clots and blood sludge. There are various clinical causes of blood clots inside the menstrual period, the common ones are gynecological inflammation, such as vaginitis, endometritis, pelvic inflammatory disease, tubal inflammation, etc. The most important one is endometritis, because normal menstruation is formed by the periodic contraction and diastole of the arteries of the endometrium, if there is inflammation in the endometrium, it will lead to obstruction of blood circulation in the small arteries, which will lead to stagnation of blood circulation, and blood will clot into clots and thus be discharged with menstruation, which can form clots and blood sludge in menstruation. or blood sludge. Secondly, for older women, tumor diseases should be suspected, such as endometrioma, uterine plasmacytoma, vaginal rhabdomyoma, etc. These tumors can also lead to blood clots and blood sludge in menstruation.