It is not normal for the color of a woman’s vaginal bleeding to change from brown to bright red in early pregnancy. Most of the brownish blood coming out of a woman’s vagina in early pregnancy is caused by preeclampsia. Usually when a preeclamptic miscarriage has just occurred, the bleeding is not much, and the blood often accumulates in the back of the vaginal fornix area, and after some time, the blood is then discharged and turns brown. If the patient with preeclampsia has a significant increase in bleeding, the blood will be quickly discharged from the vagina, the appearance of these blood is bright red. Therefore, when the color of vaginal bleeding changes from brown to bright red, it means that the bleeding has increased and the symptoms have worsened, so you should seek medical treatment in time and actively take effective treatment measures.