Trichomoniasis:
Symptoms, Causes, and Treatment

Trichomoniasis (trich) symptoms, testing, antibiotic treatment, and why partner treatment is essential.

What Is Trichomoniasis

Trichomoniasis is a sexually transmitted infection (STI) caused by the protozoan parasite Trichomonas vaginalis. It is the most common curable STI in the United States, with an estimated 3.7 million people affected at any given time. Despite its prevalence, many people have never heard of trich or do not realize they carry the infection.

The parasite primarily infects the lower genital tract -- the vulva, vagina, and cervix in women, and the urethra in men. Unlike some other STIs, trichomoniasis does not typically spread to other body sites such as the mouth, anus, or hands. The infection is highly treatable with a short course of antibiotics, but reinfection is common if sexual partners are not treated simultaneously.

If you suspect you may have trichomoniasis, InnoCre Telehealth offers confidential trichomoniasis evaluation and treatment through a same-day telehealth visit.

Symptoms in Women

Women are more likely than men to develop noticeable symptoms of trichomoniasis, though up to 70% of infected individuals of any sex may be asymptomatic. When symptoms do appear in women, they typically develop within 5 to 28 days of exposure and may include:

• Frothy, yellow-green vaginal discharge with a strong, unpleasant odor
• Vaginal itching, burning, or soreness
• Pain or discomfort during urination
• Pain during sexual intercourse
• Redness or swelling of the vulva
• Lower abdominal discomfort (less common)

Symptoms may fluctuate and can worsen during menstruation. Because these symptoms overlap with other vaginal infections such as bacterial vaginosis or yeast infections, proper testing is important for an accurate diagnosis. If you are experiencing any of these symptoms, our women's health telehealth services can help determine the cause and recommend appropriate treatment.

Symptoms in Men

Most men with trichomoniasis have no symptoms at all, which means they can unknowingly transmit the infection to sexual partners. When symptoms do occur in men, they are generally milder than in women and may include:

• Irritation or itching inside the penis
• Mild discharge from the urethra
• Burning sensation after urination or ejaculation
• Slight discomfort in the genital area

In men, the infection tends to resolve on its own more quickly than in women, but this does not mean treatment is unnecessary. Even without symptoms, an infected man can pass the parasite to partners. Additionally, untreated trichomoniasis in men has been associated with increased susceptibility to HIV and may contribute to urethritis or prostatitis over time.

How Trich Spreads

Trichomoniasis is transmitted through sexual contact, specifically through genital-to-genital contact. The parasite passes from an infected person to an uninfected person during vaginal intercourse. Transmission can also occur between female sexual partners through vulva-to-vulva contact.

Trich is not spread through casual contact such as hugging, kissing, sharing food or drinks, or using toilet seats. The parasite cannot survive for long outside the human body, so transmission through towels or clothing is extremely unlikely. It is also not transmitted through oral or anal sex.

Risk factors that increase the likelihood of contracting trichomoniasis include having multiple sexual partners, a history of other STIs, and inconsistent condom use. Because the infection is so often asymptomatic, many people transmit it without knowing they are infected. This is why routine STI testing is an important part of sexual health care.

Testing and Diagnosis

Trichomoniasis cannot be diagnosed based on symptoms alone because its presentation overlaps with several other infections. Laboratory testing is needed to confirm the diagnosis. The most accurate test is a nucleic acid amplification test (NAAT), which detects the parasite's genetic material from a vaginal swab in women or a urine sample in men.

Other diagnostic methods include wet mount microscopy, where a sample of vaginal fluid is examined under a microscope for moving parasites. While this method provides rapid results, it is less sensitive than NAAT and may miss infections in up to 50% of cases. Rapid antigen tests and culture methods are also available but are less commonly used in clinical practice.

During a telehealth visit, your provider can evaluate your symptoms, assess your risk factors, and order laboratory testing at a convenient local lab if confirmation is needed. In many cases, treatment can be initiated based on clinical presentation while test results are pending.

Treatment

Trichomoniasis is curable with prescription antibiotics. The CDC-recommended first-line treatment is a single 2-gram oral dose of metronidazole for men, or a 7-day course of metronidazole 500 mg twice daily for women. The multi-dose regimen for women has been shown to achieve higher cure rates than the single-dose approach. Tinidazole, given as a single 2-gram oral dose, is an effective alternative for both sexes.

Important precautions during treatment include:

• Avoid alcohol during treatment and for at least 72 hours after completing tinidazole (or 24 hours after metronidazole), as the combination can cause severe nausea and vomiting
• Abstain from sexual intercourse until both you and your partner have completed treatment and symptoms have resolved, typically about 7 days
• Complete the full course of medication even if symptoms improve before finishing

Reinfection rates are high -- approximately 17% within 3 months -- which is why the CDC recommends retesting 3 months after treatment. Through our trichomoniasis treatment service, prescriptions can be sent directly to your pharmacy after a telehealth evaluation.

Why Partner Treatment Matters

Treating both sexual partners simultaneously is essential for curing trichomoniasis and preventing reinfection. Because the infection is frequently asymptomatic -- especially in men -- a partner may feel perfectly healthy while still carrying the parasite. If only one person is treated, the untreated partner will likely pass the infection back during the next sexual encounter.

Expedited partner therapy (EPT) is a practice in which medication is prescribed for the patient's sexual partner without requiring the partner to be seen in person by a provider. This approach is legal in most states and is recommended by the CDC as a strategy to reduce reinfection. Your telehealth provider can discuss whether EPT is an appropriate option based on your situation and state regulations.

Having an open conversation with your partner about testing and treatment can feel difficult, but it is one of the most important steps in managing trichomoniasis effectively. Remember that trich is extremely common, easily treated, and does not carry the same health risks as some other STIs when addressed promptly.

Getting Treatment Online

Trichomoniasis is one of the STIs most suited to telehealth management. A provider can review your symptoms, sexual history, and risk factors through a confidential video visit, then prescribe appropriate antibiotic treatment and send the prescription directly to your pharmacy -- often within the same day.

If laboratory confirmation is needed, your provider can order testing at a local lab convenient to you. Follow-up testing at 3 months can also be coordinated through telehealth, making it easy to stay on top of your sexual health without repeated office visits.

At InnoCre Telehealth, we provide discreet, judgment-free STI evaluation and treatment for patients in Maryland, Washington, and Delaware. Whether you are experiencing symptoms or were notified of a partner's diagnosis, we can help you get the care you need quickly and conveniently.

Frequently Asked Questions