Trichomoniasis is a common sexually transmitted disease (STD). It often affects the lower genital tract in women and inside of the penis in men.


Trichomoniasis is caused by a specific parasite. The parasite is passed through sexual contact. It mainly affects genital tissue.

Risk Factors

Factors that may increase your chance of trichomoniasis include:
  • Multiple sexual partners
  • Sex without a condom
  • History of STDs


Trichomoniasis does not always cause symptoms. Men are less likely to have symptoms than women.Symptoms in women may include:
  • A foul-smelling, greenish-yellow or gray discharge from the vagina—often in large amounts
  • Irritation, itching, and/or soreness in the genitals
  • Pain or discomfort when urinating
  • Pain or discomfort with sex
Infection Site in Women
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Symptoms in men may include:
  • Discharge from the penis
  • Itching and/or irritation in the urethra
  • Pain or discomfort when urinating
  • Burning sensation after ejaculation
Infection Site in Men
Male Urethtra
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You will be asked about your symptoms and medical history. A physical exam will be done. Vaginal fluid or discharge will be examined from women. Urine, semen, or penile discharge will be examined from men. The samples can be sent to a lab to confirm trichomoniasis.

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