If you have a low progesterone level and brown vaginal discharge after pregnancy, you may have cervical lesions, pre-eclampsia and embryonic abortion, so you must go to the hospital for examination and treatment. Common causes and treatment methods 1, cervical lesions: bleeding caused by cervical lesions, mixed with leukorrhea can appear brown discharge, pregnant women need to go to the hospital through the speculum to check the cervix to exclude cervical lesions, if necessary, may need to carry out cervical biopsy, polypectomy and other operations; 2, pre-eclampsia abortion: abnormal bleeding resulting in brown discharge and low progesterone levels, the need for drug fertility preservation Treatment is needed to inhibit contraction of uterine smooth muscle and reduce uterine tension to maintain pregnancy. If the color of the discharge gradually becomes lighter and there is no sign of continued bleeding, it can be regarded as a successful birth control; 3. Most of them are caused by abnormal development of embryo, and need to terminate pregnancy in time, usually by drug abortion and abortion. Pregnant women should pay attention to bed rest, avoid overexertion, and strictly forbid sex to reduce the stimulation to the uterus. At the same time, avoid excessive mental tension and establish a positive and optimistic attitude. If the vaginal bleeding stops, the abdominal pain disappears and the ultrasound examination confirms the survival of the embryo, the pregnancy can be continued. If the clinical symptoms worsen, ultrasound reveals that the embryo is underdeveloped and the blood HCG does not increase or decreases, it indicates that miscarriage is inevitable and the pregnancy should be terminated in time.