Vaginitis is an infection of the vagina, the passage between the female genital opening and the uterus. A normal discharge is made of mucus secreted from the cervix and discarded vaginal cells. It is usually colorless and clear, or cloudy white. A normal discharge has little odor and causes no irritation. The amount and consistency of normal vaginal discharge often change during each woman's menstrual cycle.
Sexual excitement can also increase the amount of secretions that are produced.
A healthy vaginal discharge is a balance of organisms that helps prevent infections. When this balance is disturbed by stress, illness, douching, or some medications, an infection can occur. Another type of vaginitis is caused by the tiny one-celled Trichomonas organism. The two infections can sometimes occur together. Symptoms can vary depending on the organism causing the infection.