Can Chlamydia go away on its own?

Sometimes, but you can’t count on it. UK guidelines say untreated Chlamydia may either carry on or clear up by itself, and studies suggest up to half of genital infections clear within about 12 months.

That still leaves many infections that last for months or even years. And there’s no way to tell whether yours has gone without a test, because most people with Chlamydia never have symptoms in the first place.

While you have Chlamydia, you can pass it on to your partners, and it can spread and cause lasting damage. That’s why it’s always treated.

If Chlamydia isn’t treated, it can lead to serious problems:

• Pelvic inflammatory disease (PID): an infection of the womb, fallopian tubes and ovaries, which can lead to infertility or an ectopic pregnancy. UK research suggests about 1 in 6 women with untreated Chlamydia develop PID.
• Infection in the testicles, which can cause pain and swelling.
• Joint pain (reactive arthritis), which usually gets better after a few months.

The World Health Organization also says untreated Chlamydia may make it easier to pass on or catch HIV. Read more in “How long can you have Chlamydia before it causes damage?”

Chlamydia is the most commonly diagnosed STI in England, with 151,163 diagnoses in 2025. Most people who have it don’t get any symptoms. When symptoms do appear, they can include:

• pain or burning when you pee
• unusual discharge from the vagina, penis or bottom
• bleeding after sex or between periods
• pain in your lower tummy
• pain and swelling in the testicles

If your symptoms settle down, that doesn’t mean the infection has gone. Read more in “Do Chlamydia symptoms come and go?”

Chlamydia is treated with antibiotics. Under the latest UK guidelines, the usual treatment is doxycycline tablets taken twice a day for 7 days. If you can’t take doxycycline, for example because you’re pregnant, you’ll be given a different antibiotic, such as azithromycin taken over 3 days.

After a diagnosis:

• Avoid all sex, including oral sex, until you and your partners have finished treatment and any symptoms have gone. If you took azithromycin, wait 7 days.
• Tell your recent sexual partners, so they can get tested and treated too.
• If you’re under 25, test again about 3 months after treatment.
• If you’re pregnant, you’ll be tested again a few weeks after treatment to check it has gone.

Read more in “Is Chlamydia curable?”

Get tested for Chlamydia if:

• you’ve had sex without a condom with a new partner
• you have symptoms
• a partner tells you they have Chlamydia

Chlamydia can take about 2 weeks to show up on a test, so if you test sooner than that, test again once 2 weeks have passed. If you’re sexually active, test at least once a year and whenever you have a new partner.

Better2Know offers:

• Chlamydia home test: a urine test you take at home, from 14 days after sex, with results in 2 days.
• Peace of Mind: tests for Chlamydia, Gonorrhoea and Syphilis from 14 days after sex, with results in 2 days, at one of our clinics. A Syphilis test in the first 3 months after sex can miss the infection, so you may need a repeat test.
• Full Screen: tests for 7 infections, including Chlamydia, Gonorrhoea, HIV and Syphilis, from 28 days after sex, with results in 3 days (5 days for the home test). If you test before 45 days, a negative HIV result needs a repeat test. You can also order a Full Screen home test.

A urine test checks for Chlamydia in the genitals. If you’ve had anal or oral sex, you may also need a swab from your bottom or throat. Not sure which test you need? Our Patient Care Team is available 24/7 on 020 7099 0955.

Can Chlamydia make you infertile?

It can if it isn’t treated. Chlamydia can spread to the womb, fallopian tubes and ovaries and cause pelvic inflammatory disease, which can lead to infertility. Treating it early lowers the risk. Read more in “Can Chlamydia make you infertile?”

Can Chlamydia come back after treatment?

Antibiotics clear Chlamydia in most people, but you can catch it again if you have sex with someone who has it, including a partner who hasn’t been treated. Having had it before doesn’t make you immune. Read more in “I have had Chlamydia. Am I now immune?”

Can you test negative and still have Chlamydia?

Yes, if you test too soon. Chlamydia can take about 2 weeks to show up on a test, so if you tested earlier than that, test again. A urine test also won’t find an infection in your throat or bottom.

Does Chlamydia go away on its own in men?

Chlamydia causes fewer long-term problems in men, and UK screening guidance notes that it often clears without treatment in men who have no symptoms. But while it’s there, it can be passed on and can cause pain and swelling in the testicles, so if you test positive, you’ll still be treated.

Chlamydia can sometimes clear up by itself, but there’s no way to know whether it has without a test, and while it’s there it can be passed on and cause lasting damage. Treatment is simple and quick.

If you’ve had sex without a condom with a new partner, get tested. Order a Chlamydia home test or book a Peace of Mind test at a clinic near you. Our Patient Care Team is available 24/7 on 020 7099 0955.

Not in the UK? Choose your country from the selector at the top of the page for local tests and prices.

This article originally appeared on 17 March 2023 and was last updated on 30 September 2026.

This article is general information and not a substitute for personal medical advice.

Sources

1. British Association for Sexual Health and HIV, UK national guideline for the management of infection with Chlamydia trachomatis, July 2026. https://www.bashh.org/_userfiles/pages/files/bashh_chlamydia_guideline_july_2026.pdf
2. Molano M et al. The natural course of Chlamydia trachomatis infection in asymptomatic Colombian women: a 5-year follow-up study. Journal of Infectious Diseases, 2005;191(6):907-916. https://academic.oup.com/jid/article-abstract/191/6/907/808700
3. van Liere GAFS et al. Spontaneous clearance of urogenital, anorectal and oropharyngeal Chlamydia trachomatis and Neisseria gonorrhoeae in women, MSM and heterosexual men visiting the STI clinic: a prospective cohort study. Sexually Transmitted Infections, 2019;95(7):505-510. https://sti.bmj.com/content/95/7/505
4. NHS, Chlamydia, reviewed 24 October 2024. https://www.nhs.uk/conditions/chlamydia/
5. NHS inform, Chlamydia. https://www.nhsinform.scot/illnesses-and-conditions/sexual-and-reproductive/chlamydia/
6. NHS, Pelvic inflammatory disease (PID), reviewed 17 December 2025. https://www.nhs.uk/conditions/pelvic-inflammatory-disease-pid/
7. World Health Organization, Chlamydia, fact sheet, 21 November 2025. https://www.who.int/news-room/fact-sheets/detail/chlamydia
8. UK Health Security Agency, Sexually transmitted infections and screening for chlamydia in England: 2025 report, 2 June 2026. https://www.gov.uk/government/statistics/sexually-transmitted-infections-stis-annual-data-tables/sexually-transmitted-infections-and-screening-for-chlamydia-in-england-2025-report
9. UK Health Security Agency, National Chlamydia Screening Programme (NCSP): programme overview, 24 June 2021. https://www.gov.uk/government/publications/ncsp-programme-overview/ncsp-programme-overview
10. British Association for Sexual Health and HIV, Summary guidance on testing for sexually transmitted infections, 2023. https://www.bashh.org/_userfiles/pages/files/resources/bashh_summary_guidance_on_stis_testing_2023.pdf
11. Brook, STI testing: FAQs, updated 28 November 2024. https://www.brook.org.uk/your-life/getting-tested-for-stis/
12. British Association for Sexual Health and HIV, UK guidelines for the management of syphilis, 2024. https://bashh.org/_userfiles/pages/files/syphilis_2024.pdf