You may notice a change in the color, amount or odor of discharge. A white, curdlike discharge that looks like cottage cheese is a classic sign of yeast infection. Yellow, green or gray discharge is usually a sign of trichomonas or bacterial vaginosis. Bacterial vaginosis also has an unusual, fishy odor.
Itching is usually most noticeable with a yeast infection, though it may occur with any type of infection or irritation. A dry, irritated vaginal lining, which may be particularly uncomfortable or painful during intercourse, is usually a more prominent symptom of atrophic vaginitis. A new vaginal discharge accompanied by fever, abdominal pain or pain during intercourse may indicate a sexually transmitted disease, such as gonorrhea or chlamydia. However, gonorrhea and chlamydia usually don't cause any symptoms at all.