Sexual health

When You Can Have Sex Again After STI Treatment

After STI treatment, three things have to line up before sex is safe again: the medicine has to finish its work, symptoms have to resolve, and partners have to be treated so the infection is not handed back. How long each takes differs by infection, and for herpes, HIV, and hepatitis B, treatment manages the virus rather than clearing it.

Last updated: July 2026

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How long do you wait before having sex again?

There is no fixed number of days that fits everyone, because the wait is set by three separate things rather than one. The infection has to be fully treated. Any symptoms — discharge, sores, burning, pelvic or testicular pain — have to resolve. And every recent partner you could trade the infection back and forth with has to be treated too. The wait is the longest of those three clocks, not the shortest. Clinicians generally set the exact timing against the specific medicine you were given, so the wait after a single-dose treatment is not the same as the wait after a multi-day course. That is why a friend's answer, or a number you read once, may not be yours: the honest answer is the one tied to your treatment and your own symptoms.

Curable infections clear; lifelong ones are managed

The first thing that sets your timeline is which kind of infection you had. Chlamydia, gonorrhea, trichomoniasis, syphilis, and Mycoplasma genitalium are curable — the right treatment clears the organism, and once it is gone it stays gone unless you are exposed again. Gonorrhea is treated with an antibiotic injection, with an oral antibiotic added when chlamydia has not been ruled out 1Ref 1St. Cyr S, Barbee L, Workowski KA, et al. (Centers for Disease Control and Prevention) (2020).Update to CDC's Treatment Guidelines for Gonococcal Infection, 2020.That gonorrhea is treated with an antibiotic injection, with an additional oral antibiotic added when chlamydial coinfection has not been excluded.. Trichomoniasis, one of the most common curable STIs and frequently symptomless to begin with, is treated with oral medication 2Ref 2Centers for Disease Control and Prevention (2024).About Trichomoniasis.That trichomoniasis is a common, curable STI, frequently symptomless, and treated with oral medication.. For these infections, cure is real — after successful treatment the organism is no longer in your body. Genital herpes, HIV, and hepatitis B are different: they are viral, and treatment manages them rather than erasing them. For the curable group, 'when can I have sex again' is a genuine countdown. For the viral group, it is not.

Infection	Curable?	What resuming sex hinges on
Chlamydia, gonorrhea	Yes, with antibiotics	Treatment finished, symptoms cleared, partners treated
Trichomoniasis	Yes, with oral medication	The same, plus partner treatment
Mycoplasma genitalium	Yes, but resistance is common	Symptoms clearing; follow-up testing if they persist
Genital herpes	No — managed for life	Suppression, barriers, disclosure — ongoing
Hepatitis B	May resolve or become chronic	Partner vaccination, ongoing management

What a test of cure is, and who needs one

A test of cure is a repeat test done after treatment to confirm the infection is actually gone — and a test of cure is a different thing from retesting months later to catch a brand-new infection. Whether you need one depends on the infection and the situation; it matters most when symptoms do not settle, or with an organism known to resist first-line treatment. Mycoplasma genitalium is the clearest example: when symptoms continue after empiric treatment, follow-up testing is considered specifically because macrolide resistance is common, and the treatment approach itself is built around that resistance 3Ref 3Centers for Disease Control and Prevention (2021).Mycoplasma genitalium - STI Treatment Guidelines.That follow-up testing for Mycoplasma genitalium is considered when symptoms persist after empiric treatment, and that its treatment approach is shaped by common macrolide resistance.. For many uncomplicated infections, the practical signal that treatment worked is simpler — the symptoms resolve on the expected schedule. Persistent symptoms are not something to wait out; they are the trigger to be re-evaluated rather than a reason to assume the first treatment simply needs more time.

Retesting for reinfection is a separate clock

Being cured does not close the book, because there is a second, later reason to test: reinfection. Getting re-exposed by a partner who was never treated is one of the most common ways people end up treated twice within a few months, and a fresh infection looks exactly like the first. This is why preventing reinfection after treatment turns on partner treatment — making sure recent partners, generally those from about the last two months, are treated, sometimes through expedited partner therapy where it is offered 4Ref 4Centers for Disease Control and Prevention (2021).Expedited Partner Therapy.That treating recent sex partners — generally those from the previous roughly two months, sometimes via expedited partner therapy — is part of preventing reinfection with chlamydia and gonorrhea.. The timing of that retest, and how partner treatment is arranged, is its own subject and is covered separately. The point that belongs here is narrower: resuming sex with an untreated partner restarts the whole cycle, so the partner clock is part of your own timeline, not a side issue.

When the infection is viral: herpes, HIV, hepatitis B

For lifelong viral infections the question changes shape entirely. Genital herpes has no cure; it is managed with antiviral medication, including daily suppressive therapy that lowers the chance of passing it to a partner, and it can be transmitted even when there are no visible sores 5Ref 5Centers for Disease Control and Prevention (2024).About Genital Herpes.That genital herpes has no cure, is managed with antivirals including daily suppressive therapy that reduces transmission, and can be transmitted without visible symptoms.. So there is no 'treatment is finished' date to count toward. Hepatitis B may be an acute infection that the body clears or a chronic, lifelong one, which is why follow-up and a partner's vaccination status matter more than a waiting period 6Ref 6Centers for Disease Control and Prevention (2024).Clinical Overview of Hepatitis B.That hepatitis B may present as an acute infection that resolves or become a chronic, lifelong infection.. HIV, likewise, is managed rather than cured. For all of these, resuming sex is not a countdown — it is an ongoing set of choices about viral suppression, barrier methods, vaccinating a partner where a vaccine exists, and disclosure. The absence of an end date is not bad news; it is simply a different kind of management than a course of antibiotics.

Treatment timing is not the same as the testing window

A final source of confusion is mixing up two different clocks: how long treatment takes to work, and how long an infection takes to show up on a test in the first place. If your worry is a new exposure rather than the infection you were just treated for, the relevant clock is the detection window for that infection — and testing too soon after a new exposure can return a falsely reassuring negative. STI window periods differ by infection, and an STD window period chart by infection is the right tool for the question of when to test after exposure. That is a separate question from when you can resume sex after treatment, and keeping the two apart prevents both premature testing and premature reassurance.

Common questions

There is no universal number, because it depends on the exact treatment you were given and how fast your symptoms clear. The general principle clinicians use is to wait until the treatment course is complete, symptoms have resolved, and recent partners have been treated. Because those three timelines differ, the reliable answer is the one your treating clinician ties to your specific medication.

Not always. A test of cure confirms the infection cleared and is most relevant when symptoms persist, in certain situations, or with infections that resist first-line treatment, such as Mycoplasma genitalium. For many uncomplicated infections, symptoms resolving on schedule is the practical sign treatment worked. Symptoms that linger are a reason to be re-evaluated, not to keep waiting.

For curable infections, once treatment has cleared the organism and symptoms are gone, you are no longer carrying it — the risk of passing it returns only through a new exposure. The catch is timing: having sex before treatment has finished working, or with an untreated partner, can spread it or hand it back. For herpes, HIV, and hepatitis B, transmission remains possible and is managed rather than ended.

Symptoms clearing means the treatment is working for you, but an untreated partner is still a live source. Resuming sex before that partner is treated is the classic way a just-cured infection comes straight back, which is why partner treatment is treated as part of your own timeline rather than a separate favor. Waiting until both of you are treated protects both of you.

No. Being cured addresses this infection; it does not prevent the next one. Many clinicians suggest retesting a few months after treatment because reinfection is common, especially if a partner was not treated. Ongoing screening on whatever schedule fits your situation is a separate matter from confirming this particular infection cleared.

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When to check back with a clinician

—Discharge, burning with urination, or pelvic or testicular pain that has not improved several days after finishing treatment
—Fever with lower-abdominal or pelvic pain after treatment, which can signal pelvic inflammatory disease
—New sores, a rash on the palms or soles, or symptoms that return after they had fully cleared

Severe lower-abdominal or pelvic pain with a high fever after treatment can signal a serious pelvic infection and warrants same-day evaluation or an emergency room visit.

This article is health education, not medical advice. Timing after treatment depends on the specific infection, the medication you were given, and your own symptoms; a clinician who knows your case is the right source for when it is safe to resume sex.

References

1.St. Cyr S, Barbee L, Workowski KA, et al. (Centers for Disease Control and Prevention) (2020). Update to CDC's Treatment Guidelines for Gonococcal Infection, 2020. MMWR Morbidity and Mortality Weekly Report, Vol. 69, No. 50. doi:10.15585/mmwr.mm6950a6 ✓That gonorrhea is treated with an antibiotic injection, with an additional oral antibiotic added when chlamydial coinfection has not been excluded.
2.Centers for Disease Control and Prevention (2024). About Trichomoniasis. CDC (cdc.gov/trichomoniasis). linkThat trichomoniasis is a common, curable STI, frequently symptomless, and treated with oral medication.
3.Centers for Disease Control and Prevention (2021). Mycoplasma genitalium - STI Treatment Guidelines. CDC STI Treatment Guidelines, 2021. linkThat follow-up testing for Mycoplasma genitalium is considered when symptoms persist after empiric treatment, and that its treatment approach is shaped by common macrolide resistance.
4.Centers for Disease Control and Prevention (2021). Expedited Partner Therapy. CDC STI Treatment Guidelines, 2021. linkThat treating recent sex partners — generally those from the previous roughly two months, sometimes via expedited partner therapy — is part of preventing reinfection with chlamydia and gonorrhea.
5.Centers for Disease Control and Prevention (2024). About Genital Herpes. CDC (cdc.gov/herpes). linkThat genital herpes has no cure, is managed with antivirals including daily suppressive therapy that reduces transmission, and can be transmitted without visible symptoms.
6.Centers for Disease Control and Prevention (2024). Clinical Overview of Hepatitis B. CDC (cdc.gov/hepatitis-b). linkThat hepatitis B may present as an acute infection that resolves or become a chronic, lifelong infection.

6 sources, numbered by first appearance. General health information, not medical advice. AI-assisted editorial content — citations link their sources. Editorial policy

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