The appearance of brown vaginal discharge in mid-pregnancy usually indicates abnormal fetal development or the combination of certain diseases in the pregnant woman herself, which requires early medical attention. There are many common clinical causes, such as pre-eclampsia, cervical polyp, placenta abruptio, placenta hypotrophy, gynecological inflammation, etc., which need to be treated differently according to the specific causes. 1. Pre-eclampsia: Vaginal bleeding, i.e. brown discharge, accompanied by abdominal pain, is triggered by sexual intercourse or strong stimulation of pregnant women in mid-pregnancy. You should go to the hospital in time to perform blood HCG and gynecological ultrasound examination to make a clear diagnosis. Pre-eclampsia should pay attention to rest, if necessary, oral or intramuscular injection of fetal preservation drugs for treatment; 2, cervical polyps: cervical polyps in the middle of pregnancy will cause abnormal vaginal bleeding, manifested as vaginal brown discharge, need to be treated according to the size of polyps, small polyps can be temporarily observed, regular review; polyps larger, frequent vaginal bleeding feasible surgical removal; 3, placenta abruptio or placental hypoplasia: usually occurs in the middle and late pregnancy, with vaginal bleeding, with or without abdominal pain, uterine contractions and other symptoms, should promptly consult a doctor, according to the severity of the conservative treatment to extend the pregnancy week or timely termination of pregnancy; 4, gynecological inflammation: mid-pregnancy body resistance decreases, complications of gynecological inflammation, such as vaginitis, cervicitis, there will be brown vaginal discharge, and even abnormal vaginal The symptoms of vaginal itching and abdominal pain should be treated with medication under the guidance of a doctor and attention to vulvar cleanliness. Pregnant women in the middle of pregnancy are more sensitive and fragile than usual, so they need more care and attention. They should ensure sufficient rest and nutrition, relax, take appropriate walks and maintain personal hygiene.