Is a few days before menstruation safe period

Menstruation can be a normal phenomenon, because the essence of menstruation is endometrial shedding, so menstrual blood will be mixed with endometrial tissue, clot, etc. Mainly depends on whether the overall menstrual volume is too much, if the total menstrual volume exceeds 80ml, it is generally considered that there is a problem of menorrhagia, it needs treatment. If the menstrual volume belongs to the normal range, menstrual blood clots are normal phenomenon, no treatment.