Trichomoniasis is a sexually transmitted infection (STI) of the urethra in men and in the urethra and vagina in women. It often has no symptoms in men, but some men may experience itching or irritation on their penis. Women can experience increased vaginal discharge with a bad smell. Using a condom when having sex protects against the infection. The infection is caused by a parasite (very tiny animal) that can be cured with antibiotics.
