STD Facts: Trichomoniasis (Trichomonas) - Minnesota Dept. of Health

(caused by Trichomonas vaginalis, a protozoan parasite): Sexually Transmitted Disease Facts

Trichomoniasis is the most common curable STD in young, sexually active women. With an estimated 5 million new cases in the U.S. each year in women and men, trichomoniasis is more common than chlamydia and gonorrhea.

Download PDF versions of this fact sheet, formatted for print:

On This Page:
Signs and Symptoms
Testing and Treatment
For More Information

Signs and Symptoms

For women:

  • Some women have no symptoms
  • Usually begin 5-28 days after exposure
  • Itching, burning or pain in vagina
  • Frothy, yellow-green discharge with foul odor

For men:

  • Most men have no symptoms
  • Mild discharge from penis
  • Pain after urination or ejaculation


Trichomoniasis can be spread:  

  • Between men and women through penis-to-vagina intercourse
  • Between women through vulva-to-vulva intercourse


If trichomoniasis is left untreated:

  • Infections can be spread to sex partners
  • Uncomfortable symptoms will continue
  • In pregnant women, can cause premature delivery and low birth weight
  • It can make it easier to transmit or acquire HIV during sex


  • Avoiding vaginal, oral or anal sex is the best way to prevent STDs.
  • Latex condoms, when used consistently and correctly, can reduce the risk of transmission of trichomoniasis.
  • Always use latex condoms during vaginal sex.
  • Use a latex barrier (dental dam or condom cut in half) for oral sex on a vagina or anus.
  • Limit the number of sex partners.
  • Notify sex partners immediately if infected.
  • Infected sex partners should be treated to prevent re-infection.


  • Get a test from a medical provider if infection is suspected.
  • Trichomoniasis can be cured using medication prescribed by medical provider.
  • Partners should be treated at same time.

NOTE: A person can be re-infected after treatment.

For more information, contact:

STD, HIV and TB Section
Minnesota Department of Health

Minnesota Family Planning and STD Hotline
1-800-783-2287 Voice/TTY; 651-645-9360 (Metro)

American Social Health Association (ASHA)

CDC National STD and AIDS Hotlines
1-800-CDC-INFO; 1-888-232-6348 TTY
1-800-344-7432 (Spanish)

Content Notice: This site contains HIV or STD prevention messages that may not be appropriate for all audiences. Since HIV and other STDs are spread primarily through sexual practices or by sharing needles, prevention messages and programs may address these topics. If you are not seeking such information or may be offended by such materials, please exit this web site.

Updated Tuesday, 14-Nov-2017 15:32:19 CST