Infection with the parasite: Trichomonas vaginalis.
In many cases the disease is asymptomatic particularly in men
In women: vaginal discomfort created by itchy , pain during urination, pain may occur During intercourse, vaginal discharge is white to yellowish or greenish, reddish areas of irritation on the genitals.
In men spotting on underwear or pijamas in the morning.
Maintain protected sex with partners who are not stable in the long term