There are many reasons for redness in early pregnancy: first, whether there are abnormalities in the chromosomal development of the fetus. Secondly, is the progesterone function of the pregnant woman insufficient. If the luteinizing hormone of the pregnant woman is insufficient, luteinizing supplementation should be given. If there is no abnormality in the treatment and observation, the pregnancy can continue. If the redness persists after treatment and the embryo does not develop, abortion is required. Thirdly, redness in pregnancy is often seen in pregnant women with low thyroid function. If the level of thyroid function is low, it can also cause the symptoms of redness and miscarriage. Fourth, pregnant women combined with chronic cervicitis. Chronic inflammatory stimulation can also cause a small amount of vaginal redness, which also needs to be treated symptomatically. Fifth, the pregnant woman has a combination of chronic diseases. If a pregnant woman has a combination of chronic diseases that are not conducive to pregnancy, redness and miscarriage may also occur.