Seeing red mainly refers to bleeding caused by capillary rupture due to the separation of the fetal membranes from the uterine wall in late pregnancy, and the opening of the mouth of the uterus mostly refers to the opening of the mouth of the uterus. In most cases, 24 to 48 hours after seeing red, the labor process will be initiated to start contractions, and with the gradual intensification of the contractions, the mouth of the uterus will be gradually opened. As the contractions gradually intensify, the mouth of the uterus will gradually open. Seeing red is usually a sign of labor, and in most cases the labor process will start 24 to 48 hours after seeing red, and the mouth of the uterus will open naturally if the intensity and frequency of contractions reach a certain standard. For those who experience redness, it is necessary to go to the hospital for fetal heart rate monitoring and fetal ultrasound to determine the condition of the fetus, amniotic fluid and placenta, as well as routine gynecological examinations to determine the dilatation of the uterine opening. According to the results of the examination to determine the need to hospitalize for delivery. If the bleeding is heavy, you need to be alert to the possibility of placenta previa, then you need to seek medical attention as soon as possible, and if necessary, an emergency cesarean section is needed to terminate the pregnancy to ensure the safety of the mother and child.