Many times, during your period, menstrual blood can sit in the vaginal canal or take longer to leave your body – this blood is then exposed to more oxygen, which causes the blood to become oxidized or turn brown. Usually, this kind of blood can be anywhere from dark red to dried brown.
However, if your discharge is changing in color from before, or if there is a new odor with your discharge, you may want to go see an OB/GYN and ask about this change. It can be helpful to take a picture to show your OB/GYN or doctor when you see them next, if you do not happen to be on your period at the time.
You can also visit our Menstrual Health page for more information.