Trichomoniasis in women typically causes abnormal vaginal discharge, genital itching or burning, and discomfort during urination or sex. Symptoms usually appear within 5 to 28 days of exposure, though many women carry the infection without any noticeable signs at all.
The Most Common Symptoms
The hallmark symptom is a change in vaginal discharge. Women with trichomoniasis often notice discharge that is thin or frothy, and it can range in color from clear to white, yellow, or greenish. A strong, unpleasant fishy smell is common and often the first thing that prompts someone to seek care.
Beyond discharge, the infection frequently causes itching, burning, redness, or soreness around the genitals. Some women also notice a change in skin color in the vulvar area. Pain during urination is another frequent complaint, which is why trichomoniasis is sometimes mistaken for a urinary tract infection. Sex can also become uncomfortable or painful, and some women experience a dull ache or pain in the lower abdomen.
Not every woman gets all of these symptoms. Some notice only the discharge. Others feel burning but see no visible change. The severity can range from mild irritation to significant discomfort that interferes with daily life.
Why Many Women Have No Symptoms at All
A significant portion of women with trichomoniasis are completely asymptomatic, meaning they feel perfectly fine and have no idea they’re infected. This is one of the reasons the infection spreads so easily. Without symptoms, there’s no obvious reason to get tested, and the parasite can be passed to sexual partners unknowingly.
Even in asymptomatic cases, the infection can still cause low-level inflammation in the reproductive tract. This matters because the inflammation can increase vulnerability to other sexually transmitted infections and lead to complications over time. If you’ve had unprotected sex with a partner who tests positive, testing is worthwhile regardless of how you feel.
How Symptoms Develop Over Time
After exposure to the parasite (called Trichomonas vaginalis), symptoms generally take between 5 and 28 days to appear. Some women notice changes within the first week, while others don’t develop symptoms for nearly a month. In some cases, the infection stays silent for even longer before flaring up, sometimes triggered by a shift in vaginal pH or immune function.
Symptoms can also come and go. A woman might notice discharge for a few days, then feel fine for a week, only to have burning return. This fluctuating pattern can make it easy to dismiss the infection as something minor or assume it resolved on its own. It doesn’t. Without treatment, trichomoniasis persists and can be carried for months or even years.
How Trichomoniasis Differs From Similar Infections
The symptoms of trichomoniasis overlap with bacterial vaginosis and yeast infections, which makes self-diagnosis unreliable. A few patterns can help distinguish them, though testing is the only way to be sure.
- Trichomoniasis tends to produce frothy, greenish or yellowish discharge with a fishy odor, along with genital redness and irritation. Pain during sex and urination is common.
- Bacterial vaginosis also causes a fishy smell and thin discharge, but the discharge is typically grayish-white rather than green, and there’s usually less itching or external irritation.
- Yeast infections produce thick, white, cottage cheese-like discharge with intense itching but rarely have a strong odor.
If you’re experiencing any combination of unusual discharge, odor, and genital discomfort, getting tested rather than guessing is the fastest path to the right treatment.
How It’s Diagnosed
The traditional test involves examining a sample of vaginal fluid under a microscope (called a wet mount), but this method only catches the infection 44% to 68% of the time. It misses a lot of cases because the parasites have to be alive and moving to be identified visually.
Newer molecular tests, known as nucleic acid amplification tests, are far more accurate. These detect genetic material from the parasite rather than relying on visual identification, and they have sensitivity rates above 95%, with some reaching nearly 100%. If your provider uses a wet mount and the result is negative but your symptoms persist, asking about molecular testing is reasonable.
What a Clinical Exam May Reveal
During a pelvic exam, a healthcare provider may notice visible inflammation of the vaginal walls or cervix. In some cases, the cervix develops tiny red spots from small hemorrhages, creating a speckled appearance sometimes called a “strawberry cervix.” This finding is distinctive to trichomoniasis, though it’s not always visible to the naked eye and may only show up with magnification. The vaginal walls may also appear red and swollen, and there’s often an increase in the volume of discharge present.
Risks of Leaving It Untreated
Beyond the discomfort, untreated trichomoniasis carries real health consequences. The chronic inflammation it causes in the genital tract can make it easier to acquire other sexually transmitted infections, including HIV. The irritated, inflamed tissue provides more entry points for other pathogens.
During pregnancy, the stakes are higher. Untreated trichomoniasis is linked to preterm delivery, low birth weight, and premature rupture of membranes (when the water breaks too early). In rare cases, the parasite can be transmitted to the baby during delivery, potentially causing vaginal or respiratory infections in the newborn.
What Treatment Looks Like
Trichomoniasis is treated with a course of oral antibiotics. The infection is caused by a parasite, not bacteria, but the medications used are effective against both. Treatment is straightforward, and symptoms typically begin improving within a few days.
Both you and your sexual partner need to be treated at the same time, even if your partner has no symptoms. Without simultaneous treatment, the infection simply passes back and forth. You’ll also need to avoid sex until both of you have completed treatment and symptoms have fully resolved. Reinfection is common, so follow-up testing about three months after treatment is generally recommended to make sure the infection hasn’t returned.