Brown discharge with no period or after sex can ... Polyps can also cause white or yellow mucus and vaginal bleeding after sex. Fibroids can cause longer periods and a frequent urge to urinate.

Brown discharge before a period could be implantation bleeding, which indicates pregnancy, or it may be due to perimenopause. In some cases, brown discharge may indicate an underlying condition.

Nasal discharge that is yellow, green or brown can be a sign of an infection ... While the color of the mucus does not distinguish between a viral or a bacterial infection, several other signs ...

You may have excess discharge that's runny and clear if you're ovulating. Bacterial vaginosis may also cause excess discharge, in addition to a fishy smell and itching. Yeast infections ...

If your discharge smells bad but not fishy, it could be a sign of a yeast infection or an STI. Leaving a tampon in too long — especially for many days — could also cause a strong, foul odor.