Pregnancy with faint blood usually has the following causes: First, bleeding phenomenon caused by embryo implantation. During the process of fertilized egg implantation, the uterine lining is easily damaged slightly, so a small amount of blood will appear. If the amount of blood does not increase and the color of the bleeding does not deepen, no treatment is needed. Secondly, there is a possibility of pre-eclampsia. If there is obvious abdominal pain or other physical discomfort while bleeding, you should go to the hospital for examination in time, and if necessary, carry out birth control under the guidance of a doctor. Third, the presence of gynecological diseases, such as the more common vaginitis, cervicitis, cervical erosion or endometritis. It is recommended that you consult your doctor in detail according to your own physical condition. Don’t choose the treatment blindly and don’t insert medicine into the vagina at will to avoid affecting the normal development of the fetus.