The presence of blood in the cervical mucus in late pregnancy is not necessarily a redness, but may also be an abnormality caused by the woman’s cervical pathology, abnormal placenta position and other conditions. Seeing red generally refers to the rupture of small blood vessels locally due to the separation of the fetal membranes and the uterine wall as a result of the descent of the fetal head pressing on the cervical canal in late pregnancy. Uterine contractions are usually initiated within 24-48 hours after the onset of redness and are a precursor to labor. The amount of blood at the time of redness is usually small. If the bleeding and bleeding increase after the cervical mucus with blood, then you need to go to the hospital in time to rule out placenta praevia, placental abruption, and so on. When a woman’s cervical mucus with blood, if it does not occur in late pregnancy, it is best to go to the hospital to do gynecological examination to see if there is cervical lesions, or the occurrence of preterm miscarriage, preterm premature labor, etc., so as not to delay the diagnosis and treatment, which affects the fetus and the health of the pregnant woman.