The presence of brown discharge a few days before menstruation is not normal, and normally there will be no brown discharge occurring. There are more reasons for this: First, when the luteal function is insufficient, it can cause abnormal bleeding to occur because the progesterone in the body cannot secrete the normal amount. In the week before the menstrual period for blood sampling, laboratory tests estrogen, luteinizing hormone and progesterone, to determine whether there are abnormalities, according to the situation to take oral medication to deal with. Second, when there is an IUD, due to ring stimulation can also cause premenstrual or brown discharge occurs, first observe a period of time. But the time of the IUD has been more than six months, this time to consider removing the ring to avoid the chance of infection. Third, to rule out the presence of fibroids, endometrial polyps, ovarian cysts. When the ovarian function is reduced, there will also be brown discharge occurring.