What can brown vaginal discharge before and after menstruation testify?

It is difficult to propose a specific method of treatment based on such a short description. In this case, I encourage you to make an appointment with a gynecologist who will adjust the treatment according to your current clinical condition. Brown vaginal discharge that appears before menstruation may have a hormonal background. The causes of brown vaginal discharge after the period are most often infections and sexually transmitted diseases. They can also be caused by cervical erosion, polyps in the uterine cavity or fibroids. I enclose materials that may be interesting and information about the possibility of using teleconsultation: https://www.gdziepolek.pl/telekonsultacja https://www.gdziepolek.pl/artykuly/jak-przygotowac-sie-do-wizyty-u-ginekologa