When a pregnant woman experiences redness in late pregnancy, it usually strikes within 24-48 hours, and the baby is born within 24 hours of the official onset. Vaginal redness is a small amount of bleeding caused by the separation of the fetal membranes near the inner cervical opening from the uterine wall, causing a rupture of the capillaries in the uterine wall. This is the most reliable sign of labor because it is mixed with some cervical mucus, so it appears as a thicker, lighter red discharge. Vaginal redness also indicates that the cervix is maturing and ready for labor. Normal vaginal redness is relatively small and significantly less than menstrual flow. If there is excessive vaginal bleeding, it is usually necessary to differentiate it from placenta praevia, placenta abruptio, or cervical disease. After vaginal redness, it is important to go to the hospital in time to assess the condition of the cervix, improve fetal heart monitoring, ultrasound and other tests to evaluate the intrauterine condition of the fetus, pay attention to fetal movements and prepare for hospitalization.