It is not normal for menstruation to come for eight days. Under normal circumstances, the period is usually 3-7 days. If the prolonged menstrual period is considered to be caused by low estrogen level, in addition, it may be caused by uterine fibroids, cervical polyps, endometritis, etc.. If the IUD can also cause prolonged menstruation, it is best to go to the hospital to check the hormone six items, and it is also recommended to do ultrasound examination. If the estrogen level is low, you need to supplement estrogen reasonably, and it is recommended to eat more bean food. If it is fibroids or cervical polyps, it can be treated by minimally invasive surgery, and pay attention to hygiene after surgery to avoid infection. If it is endometritis, it needs to be treated with antibiotics. If the long period is caused by the contraceptive ring, you can take reasonable drugs to stop bleeding under the guidance of the doctor to observe, taking drugs to treat the effect is not much need to remove the ring. Prolonged periods can cause gynecological infections, it is best to pay attention to hygiene.