Where does trichomoniasis come from?

The parasite can move between sexual partners during genital contact. It may remain unnoticed because symptoms are often absent or mild. A diagnosis does not prove recent transmission, infidelity, or a specific partner as the source; the infection can be present for some time before it is detected. It is not generally acquired from ordinary household contact or shared toilet seats.

Discharge or itching can have many causes. Review [Vaginal Discharge](/symptoms/vaginal-discharge/) and [Vaginal Itching](/symptoms/vaginal-itching/) if those symptoms are present, while arranging testing rather than trying to identify the source from symptoms.

If you or a partner has a diagnosis, arrange assessment for both partners as advised. Pause sexual contact or follow safer-sex instructions from your clinician until treatment plans are complete. Take prescribed medicine as directed and tell the clinician about pregnancy, allergies, or other medicines. Do not rely on symptoms to decide that treatment worked. Clinician-directed [Antibiotic Treatment for Pelvic Infection](/treatments/medical-gynaecology/antibiotic-treatment-for-pelvic-infection/) may be discussed when appropriate.

Seek prompt assessment after a partner’s diagnosis or when you develop discharge, itching, painful urination, or pain during sex. Contact a clinician promptly if you are pregnant or symptoms return. Severe pelvic pain, fever, faintness, or vomiting warrants urgent medical attention.

Ask how testing works, whether partners need treatment, when sex can resume, and whether another infection could explain your symptoms.