As uncommon as this is it may not be cause for great concern. Brown vaginal discharge is most often associated with old endometrial tissues. In other words, if your period is late you might get a brown, rather than red, discharge. It could also mean that for whatever reason during your last menses the entire uterine lining failed to make a timely exit. What you are seeing now is the fashionably late exit.
In some cases however there is cause for concern. Brown vaginal discharge can also be a symptom of a medical concern that is much more sinister than leftover endometrial cells.
Some common conditions causing brown vaginal discharge include: cervical cancer, Pelvic Inflammatory Disease (PID), perimenopause, menopause, or sexually transmitted diseases like gonorrhea, Chlamydia or vaginal warts.
If the cause of the brown vaginal discharge is simply old uterine cells, then the treatment may be simple life style suggestions such as better nutrition, regular exercise and drinking more water. If, however you discover the discharge is a result of another condition treatments will be aimed at curing that particular disease. For more detailed information study your diagnosis. A brief list of treatment options for other causes of brown vaginal discharge include: fuyan pill, prescription medication, chemotherapy, surgery, dietary supplements, a pap smear and other medical testing and repeat visits to the doctor.