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Trichomoniasis is an STI caused by a tiny parasite called Trichomonas vaginalis (TV). It can be easily passed on through sex and most people don't know they're infected.
In women, trichomoniasis can cause a frothy yellow or watery vaginal discharge that has an unpleasant smell, soreness or itching around the vagina, and pain when passing urine.
In men, trichomoniasis rarely causes symptoms. You may experience pain or burning after passing urine, a whitish discharge, or an inflamed foreskin.
Trichomoniasis can sometimes be difficult to diagnose and your GP may suggest you go to a specialist clinic for a urine or swab test. Once diagnosed, it can usually be treated with antibiotics.
Call 0333 300 2100 for more information about sexual health and contraception in Merton, Richmond and Wandsworth.