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Sexually transmitted disease (STD) symptoms

Trichomoniasis symptoms

Trichomoniasis is a common sexually transmitted infection caused by a parasite that is too tiny to see with the eyes. The parasite is called Trichomonas vaginalis. This organism spreads during sex with someone who already has the infection. It often infects the vagina, vulva or cervix. It also tends to infect the tube through which urine leaves the penis or vagina, called the urethra.

When trichomoniasis causes symptoms, they may appear within 5 to 28 days after being exposed to the parasite. The symptoms range from mild irritation to serious swelling called inflammation.

Trichomoniasis symptoms can include:

  • Clear, white, greenish or yellowish vaginal discharge.
  • Discharge from the penis.
  • Strong vaginal odor that may smell fishy.
  • Vaginal itching, burning, soreness or irritation.
  • Itching or irritation inside the penis.
  • Pain during sex.
  • Painful urination.
  • Rarely, pain in the lower stomach area.