What can a brown vaginal discharge mean?

Spotting. Brown vaginal discharge can mean small amounts of bleeding and it turns brown when older or it can mean severe vaginal infection. Brown vaginal discharge is also associated with a retained tampon. In pregnancy it can mean possible miscarriage and should be checked by doctor. Mid Cycle, it can indicate ovulation and 1 week postulation, it can signal implantation.
Brown d/c. Brown discharge may be older, deoxygenated blood. However if you develop discharge that has an odor, causes redness, swelling, itching or pain - please seek medical evaluation.