Under normal circumstances, women will not have brown discharge after pregnancy, if the symptoms of brown discharge appear, it may be caused by the following factors: 1, it may be due to the phenomenon of pre-eclampsia after pregnancy, resulting in brown vaginal discharge, pregnant women will also be accompanied by abdominal pain and other symptoms. 2, it may be caused by diseases such as cervical erosion or pelvic inflammatory disease, pregnant women will be accompanied by increased leucorrhea secretion phenomenon. 3, pregnant women are suffering from cervical cancer, tubal cancer or ovarian cancer and other diseases. 3.Pregnant women are suffering from cervical cancer, fallopian tube cancer or ovarian cancer and other diseases. When a pregnant woman has symptoms of brown vaginal discharge after pregnancy, she should go to the hospital for ultrasound and progesterone examination, and if it is caused by pre-eclampsia, she should undergo timely birth control treatment. If it is caused by inflammation, it should be treated with medication under the guidance of a doctor.