Will Trichomoniasis Go Away on Its Own Without Treatment?

Quick Answer: No, trichomoniasis will not go away on its own. Unlike some viral infections that the immune system can suppress, Trichomonas vaginalis is a parasite that requires prescription medication — metronidazole or tinidazole — to be eliminated. Without treatment, the infection can persist for months or years.

Why Trichomoniasis Does Not Clear on Its Own

Trichomonas vaginalis is a protozoan parasite, not a bacterium or virus. Your immune system can manage the infection to some degree — which is why many people remain asymptomatic — but it typically cannot eradicate the parasite entirely. According to the CDC, trichomoniasis requires antiparasitic medication to resolve.

In my clinical experience, I occasionally see patients who report that their symptoms went away and assumed they were cured. What actually happened is that the infection transitioned from symptomatic to asymptomatic. The parasite was still present, still replicating, and still capable of transmission and complications. Learn more about how long trich can remain in the body in our article on trichomoniasis dormancy.

How Is Trichomoniasis Treated?

The standard treatments recommended by the CDC STI Treatment Guidelines are:

• Metronidazole 500 mg — twice daily for 7 days (preferred regimen for women)

• Metronidazole 2 grams — single oral dose (alternative; preferred for men)

• Tinidazole 2 grams — single oral dose (alternative for either sex)

The 7-day metronidazole course has been shown to have higher cure rates than the single-dose regimen in women. For men, single-dose metronidazole is generally sufficient. Both sexual partners must be treated simultaneously to prevent the ping-pong effect of reinfection.

Critical rule: avoid alcohol completely during metronidazole or tinidazole treatment and for at least 24 hours after metronidazole (72 hours after tinidazole). Combining these medications with alcohol can cause severe nausea, vomiting, and abdominal cramping.

What Happens If You Do Not Treat Trichomoniasis?

Untreated trich is not just a nuisance — it carries real health consequences:

• Increased HIV risk — the genital inflammation caused by trich creates microtears that facilitate HIV entry, increasing transmission risk 2 to 3 times

• Pregnancy complications — untreated trich is associated with preterm delivery and low birth weight. See our article on trichomoniasis during pregnancy

• Chronic inflammation — ongoing infection can cause persistent genital discomfort

• Facilitation of other STIs — the inflammatory environment makes it easier to acquire chlamydia, gonorrhea, and other infections

Can Trichomoniasis Come Back After Treatment?

Reinfection rates for trichomoniasis are high — approximately 17% within 3 months, according to published data from the NIH. This is almost always due to reinfection from an untreated partner, not treatment failure. This is why simultaneous partner treatment is essential, and why the CDC recommends retesting 3 months after completing treatment.

How to Prevent Reinfection After Treatment

In my clinical practice, the number one reason patients come back with trichomoniasis after treatment is an untreated partner. To break this cycle, both partners must be treated at the same time — ideally with the same medication and on the same day. The CDC supports expedited partner therapy (EPT) for trichomoniasis, where the diagnosed patient can bring home a prescription for their partner without requiring a separate clinic visit. After treatment, avoid all sexual contact for at least 7 days and use condoms until both partners have been confirmed negative at the 3-month retest.

When to Seek Urgent Care

• You develop severe vaginal or penile irritation with green or frothy discharge

• You experience pelvic pain alongside trich symptoms

• You are pregnant and suspect or have been exposed to trichomoniasis

• You completed treatment but symptoms have returned — this may indicate reinfection or resistant trich

• You develop an allergic reaction to metronidazole or tinidazole

Frequently Asked Questions

Can over-the-counter products treat trichomoniasis?

No. There are no effective over-the-counter treatments for trichomoniasis. Yeast infection creams, BV treatments, and home remedies will not eliminate Trichomonas vaginalis. Only prescription metronidazole or tinidazole can cure the infection.

How do I know if my trich treatment worked?

If your symptoms resolve within 1 to 2 weeks after completing treatment, the medication likely worked. The CDC recommends retesting at 3 months. You can order a follow-up test easily.

Can trich symptoms come and go?

Yes. Some patients report fluctuating symptoms — discharge and itching that seem to improve before returning. This does not mean the infection cleared. The parasite is still present and the immune response is waxing and waning.

Is trichomoniasis the same as BV?

No, though the symptoms can overlap significantly. BV is caused by a bacterial imbalance, while trich is caused by a parasite. The treatments differ and misdiagnosing one as the other means the actual infection goes untreated. Read our full trichomoniasis vs. BV comparison. For broader context on STD symptom timelines, see our dedicated guide.