Trichomoniasis is an infection of the vagina and penis.
It is a sexually transmitted disease that can be treated and does not cause any serious permanent damage. A type of tiny organism called Trichomonas vaginalis causes the infection. Sexual partners not using condoms can spread these organisms in sexual secretions. Many women infected with Trichomonas do not have any symptoms. When they do have symptoms, the most common ones are a large amount of vaginal discharge and vaginal itching.