Can you get an STD from a sex toy? Trichomoniasis (trich) is more common than you think and often goes unnoticed! About 50% or more people don't have symptoms, so you won't know you've got it until you get tested for STIs: Trichomoniasis IPPF Scarlet SEX ED SUNDAY: Trichomoniasis Trichomoniasis (commonly known as 'trike' or 'trich') is an STI caused by a parasite that can cause inflammation and infection of the urethra, vagina, and cervix