Whether vaginal bleeding is normal after pregnancy needs to be determined by the cause of the bleeding. If the bleeding is caused by the fertilized egg coming to term, it is usually normal. If the bleeding is due to pre-eclampsia, ectopic pregnancy, gravida and cervical lesions, it is abnormal and requires prompt action for treatment. If vaginal bleeding persists during pregnancy, timely consultation for examination should be made to avoid affecting the normal development of the fetus. 1. fertilized egg implantation: in some pregnant women, if capillary bleeding occurs during the process of fertilized egg implantation into the endometrium, it will cause vaginal bleeding, which is usually relatively small, without abdominal pain, and the bleeding can gradually disappear in 1-2 days without special treatment. 2. pre-eclampsia miscarriage: pre-eclampsia miscarriage is generally It is caused by fetal chromosomal abnormalities and maternal ovarian luteal insufficiency, which may result in brown or pink bloody discharge from the vagina, and if not treated in time, symptoms of lower abdominal pain and back pain may occur, leading to inevitable miscarriage. It is recommended that pregnant women should seek medical consultation and carry out the necessary treatment for fetal preservation; 3. ectopic pregnancy: that is, ectopic pregnancy, which is usually accompanied by severe abdominal pain along with abnormal vaginal bleeding, which can be life-threatening in serious cases and should be terminated; 4. gravida: gravida belongs to placental disease, which can manifest as abnormal vaginal bleeding and should be treated with uterine clearance surgery as soon as possible; 5. placenta praevia: if placenta abruptio occurs, it can also cause bleeding and usually It is usually necessary to rest in bed and apply drugs to suppress contractions under the guidance of the doctor; 6. cervical lesions: such as chronic cervicitis, cervical polyps, cervical cancer and other diseases may cause bleeding, so you should go to the hospital in time to clarify the cause and take active treatment.