<p>Trichomoniasis is a <a href="https://medlineplus.gov/sexuallytransmittedinfections.html">sexually transmitted infection</a> (STI) caused by a parasite. It spreads from person to person during sex. Many people do not have any symptoms. If you do get symptoms, they usually happen within 5 to 28 days after being infected.</p> <p>It can cause <a href="https://medlineplus.gov/vaginitis.html">vaginitis</a> in women. Symptoms include:</p><ul> <li>Yellow-green or gray discharge from the vagina</li> <li>Discomfort during sex</li> <li>Vaginal odor</li> <li>Painful urination</li> <li>Itching burning, and soreness of the vagina and vulva</li> </ul> <p>Most men do not have symptoms. If they do, they may have:</p><ul> <li>Itching or irritation inside the penis</li> <li>Burning after urination or ejaculation</li> <li>Discharge from the penis</li> </ul> <p>Trichomoniasis can increase the risk of getting or spreading other sexually transmitted infections. Pregnant women with trichomoniasis are more likely to <a href="https://medlineplus.gov/pretermlabor.html">give birth too early</a>, and their babies are more likely have a <a href="https://medlineplus.gov/birthweight.html">low birth weight</a>.</p> <p>Lab tests can tell if you have the infection. Treatment is with <a href="https://medlineplus.gov/antibiotics.html">antibiotics</a>. If you are infected, you and your partner must be treated.</p> <p>Correct usage of latex condoms greatly reduces, but does not eliminate, the risk of catching or spreading trichomoniasis. If your or your partner is <a href="https://medlineplus.gov/latexallergy.html">allergic to latex</a>, you can use polyurethane condoms. The most reliable way to avoid infection is to not have anal, vaginal, or oral sex.</p> <p class="">Centers for Disease Control and Prevention</p>