What is brown discharge? Brown discharge refers to the secretion from the female reproductive system that contains a large amount of blood, causing the color of the secretion to turn brown or dark red. Under normal circumstances, female reproductive system secretions should be transparent or white, and mild yellow is a normal color. But if brown or dark red appears in the secretion, you need to pay attention. Brown discharge is a common problem, but if left untreated, it can affect the health of your reproductive organs. brown