Trichomoniasis typically clears up within about one week of completing treatment. Most people can expect symptoms like discharge, irritation, and burning to fade over that seven-day window as the medication works through the body. The exact timeline depends on which treatment regimen you’re prescribed and whether your sexual partners are treated at the same time.
What Treatment Looks Like
Trichomoniasis is caused by a parasite, not a bacterium or virus, but it’s treated with antiparasitic medications taken by mouth. There are two main approaches your provider may choose between.
The first is a single large dose taken all at once. This is the simplest option, but cure rates with this approach range from about 84% to 98%. The second is a seven-day course of smaller doses taken twice daily. This multi-day regimen is more effective, cutting the rate of persistent infection roughly in half compared to the single dose. Current CDC guidelines favor the multi-day course for women, especially those who are symptomatic or have had trichomoniasis before. An alternative medication has slightly higher cure rates overall, ranging from 92% to 100% in clinical trials.
For women living with HIV, the seven-day course is particularly important. Clinical trial data showed the single-dose approach was significantly less effective in this group.
When Symptoms Actually Go Away
If you’re on the single-dose treatment, the medication starts working immediately, but you should expect about a week before symptoms fully resolve. If you’re on the seven-day course, symptoms typically clear by the time you finish or shortly after. In either case, the standard guidance is to wait a full seven days after completing treatment before having sex again. This gives the medication enough time to fully eliminate the parasite.
Some people notice improvement within the first two or three days, particularly with symptoms like itching and burning. Discharge may take a bit longer to return to normal. If your symptoms haven’t improved noticeably after a week, that’s worth following up on, as it could signal treatment failure or reinfection.
Why It Might Last Longer Than Expected
The most common reason trichomoniasis lingers after treatment is reinfection from an untreated partner. The parasite passes easily during sex, so if your partner still carries it, you can be reinfected almost immediately, making it seem like the treatment didn’t work. Both you and your partner (or partners) need to complete treatment and wait seven days before resuming sexual contact.
Other factors that can extend the infection:
- Single-dose treatment in higher-risk cases. Women who are symptomatic, have a history of trichomoniasis, or are living with HIV have better outcomes with the seven-day regimen. If you were given a single dose and still have symptoms, your provider may prescribe the longer course.
- Drug resistance. In rare cases, the parasite doesn’t respond well to standard treatment. If a second round of the same medication fails, providers can try higher doses or switch medications.
- Not finishing the full course. Stopping the seven-day regimen early, even if you feel better, gives the parasite a chance to survive and bounce back.
Why Partner Treatment Matters
Treating partners simultaneously is one of the most important steps in making sure trichomoniasis actually stays gone. Some providers offer what’s called expedited partner therapy, where they prescribe medication for your partner without requiring a separate office visit. This removes a common barrier, since many partners never make it to their own appointment.
Both you and your partners need to wait seven days after completing treatment before having any vaginal, anal, or oral sex. If only one person is treated, or if you resume sexual contact before the full waiting period is up, the infection can simply pass back and forth.
Follow-Up Testing
Retesting is recommended to confirm the infection is gone, typically at about one month after treatment. Testing earlier than that can sometimes pick up remnants of the dead parasite and produce a false positive, so the waiting period matters. This follow-up is especially important for women, given that reinfection rates are high and trichomoniasis can persist without obvious symptoms.
What Happens Without Treatment
Left untreated, trichomoniasis does not resolve on its own. The parasite can survive in the body for months or even years. During that time, it increases the risk of contracting or transmitting other sexually transmitted infections, including HIV, because the ongoing inflammation makes genital tissue more vulnerable. For pregnant women, untreated trichomoniasis raises the risk of preterm delivery and low birth weight. Many people with trichomoniasis have no symptoms at all, which is why it often goes undiagnosed and untreated for long stretches.