The brown vaginal discharge at 10 weeks of pregnancy is usually an abnormal phenomenon, you need to go to the hospital at the first time to be alert to the possibility of pre-eclampsia, embryonic abortion, ectopic pregnancy, etc. In addition, cervical disease during pregnancy may also cause brown vaginal discharge. 1, pre-eclampsia: is the most common cause of brown vaginal discharge at 10 weeks of pregnancy, the most important clinical manifestation is a small amount of vaginal bleeding, often for Dark red or bloody leucorrhea, because the fetal sac is unstable at 10 weeks of pregnancy, when the uterus is subjected to large vibrations, such as sexual intercourse and bumps, vaginal bleeding and other conditions are likely to occur, accompanied by paroxysmal abdominal pain. Pay attention to bed rest, avoid strenuous exercise, go to the hospital for ultrasound examination in time to understand the intrauterine condition of the fetus, and take oral progesterone and dextran under the guidance of the doctor for fetal preservation treatment; 2. Embryonic abortion: most pregnant women have no uncomfortable symptoms and may have a small amount of brown vaginal discharge. Once the diagnosis of embryonic abortion is confirmed, the uterus should be cleared immediately so that the fetus and embryonic tissues can be expelled as soon as possible to avoid infection or hemorrhage; after the operation, it is recommended to send the pregnancy tissues for examination to clarify the cause of fetal abortion; 3. Ectopic pregnancy: after the abortion, there will be a small amount of irregular vaginal bleeding with dark color and pain in the lower abdomen, if the relevant symptoms appear, go to the hospital for ultrasound examination as soon as possible; 4. Cervical Lesions: If pregnant women suffer from cervicitis, cervical polyps or cervical cancer during pregnancy, they will show brown vaginal discharge, which can usually be initially identified through gynecological examination. If any of these conditions occur, it is recommended to seek medical attention in time to avoid delaying treatment. Keep your mood relaxed, pay attention to more rest, less activity and pay attention to personal hygiene.