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The Call-On-Doc Guide to Trichomoniasis

Published on Jul 20, 2023 | 10:20 AM

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What Is Trichomoniasis?

Trichomoniasis (often called “trich”) is a common sexually transmitted infection (STI) caused by a parasite called Trichomonas vaginalis. It is one of the most common curable STIs worldwide, yet it frequently goes undiagnosed because many people have mild or no symptoms.

Trichomoniasis primarily affects the vagina and urethra, but it can also infect the penis. When diagnosed, it is easily treated with prescription medication.

Trichomoniasis Symptoms

Symptoms may appear 5–28 days after exposure, though many people remain asymptomatic.

Common symptoms include:

In women

  • Vaginal discharge (often yellow-green, frothy, or foul-smelling)

  • Vaginal itching or irritation

  • Pain or burning during urination

  • Pain during sex

  • Vulvar redness or swelling

In men

  • Mild penile discharge

  • Burning during urination or ejaculation

  • Itching or irritation inside the penis

Because symptoms can be subtle or absent, testing is the only reliable way to confirm infection.

How Trichomoniasis Spreads

Trichomoniasis spreads through:

  • Vaginal sex

  • Genital-to-genital contact

It is less commonly transmitted through oral or anal sex, but transmission can occur even when no symptoms are present.

how-trichomoniasis-spreads

How Trichomoniasis Is Diagnosed

Diagnosis is made using laboratory testing, which may include:

  • Vaginal swab testing

  • Urine testing

  • Rapid antigen tests or NAAT testing

Routine STI screening may not always include trichomoniasis unless symptoms or risk factors are present, making targeted testing important.

how-trichomoniasis-is-diagnosed

Trichomoniasis Treatment

Trichomoniasis is curable with prescription medication.

Standard treatment includes:

  • Metronidazole

  • Tinidazole

Treatment notes:

  • Medication may be given as a single dose or short course

  • Avoid alcohol during treatment and for 24–72 hours afterward

  • Sexual partners must be treated at the same time

  • Avoid sexual activity until treatment is complete and symptoms resolve

  • Retesting may be recommended in some cases

What Happens If Trichomoniasis Is Untreated?

Untreated trichomoniasis can increase the risk of:

  • Pelvic inflammatory disease (PID)

  • Pregnancy complications (preterm delivery, low birth weight)

  • Increased susceptibility to HIV

  • Ongoing genital irritation and discomfort

Early diagnosis and treatment significantly reduce these risks.

Trichomoniasis Care With CallOnDoc

CallOnDoc provides confidential, judgment-free trichomoniasis care online.

With a virtual visit, you can:

  • Discuss symptoms or exposure with a licensed provider

  • Receive appropriate prescription treatment when indicated

  • Avoid in-person clinic wait times

  • Access discreet care quickly

Healthcare that fits your life — not your calendar.

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Shelly House, FNP-BC,

updated 1/23/2026 Shelly House, FNP, is a Family Nurse Practitioner and Call-On-Doc’s trusted medical education voice. With extensive experience in telehealth and patient-centered care, Ms. House is dedicated to making complex health topics simple and accessible. Through evidence-based content, provider collaboration, and a passion for empowering patients, her mission is to break down barriers to healthcare by delivering clear, compassionate, and practical medical guidance.

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