Quick answer: Most women with chlamydia — about 7 in 10 — have no symptoms at all. When symptoms do appear, they usually show up 1–3 weeks after exposure and can include unusual vaginal discharge, burning when you pee, bleeding between periods or after sex, and lower belly pain. Because it's so often silent, the only way to know for sure is a test. The good news: chlamydia is common, nothing to be ashamed of, and completely curable with antibiotics.

If you're reading this because something feels off, or because a partner told you to get checked — you're doing exactly the right thing. Let's walk through it calmly.

Why chlamydia is so often silent in women

Chlamydia is sometimes called a "silent" infection for a reason. The bacteria (Chlamydia trachomatis) can live in the cervix without causing any obvious irritation. Studies consistently find that roughly 70% of women with chlamydia notice nothing at all.

That doesn't mean it's harmless. A silent infection is still active — it can still be passed to partners, and if left untreated over months or years, it can quietly cause damage. That's the whole reason routine screening exists: not to scare you, but because symptoms are an unreliable alarm system.

The symptoms to watch for

When chlamydia does cause symptoms in women, they tend to be subtle and easy to mistake for something else — a yeast infection, a UTI, or just an "off" week. Look for:

  • Unusual vaginal discharge — often a change in colour, smell, or amount
  • Burning or pain when you urinate
  • Bleeding between periods
  • Bleeding or spotting after sex
  • Pain or discomfort during sex
  • Lower abdominal or pelvic pain

Chlamydia can also infect the rectum (causing pain, discharge, or bleeding) and, less commonly, the throat — usually without symptoms — after oral or anal sex.

One honest note: none of these symptoms are unique to chlamydia. A burning pee could be a UTI; unusual discharge could be bacterial vaginosis. That overlap is exactly why guessing doesn't work, and testing does.

How soon do symptoms appear?

If symptoms show up at all, it's usually 1 to 3 weeks after exposure. But they can also appear much later — or come and go — which is part of what makes chlamydia tricky. A quiet stretch doesn't mean the infection has cleared. (For more on timing and when a test becomes accurate, see our guide on the chlamydia testing window.)

What happens if it's left untreated

This is the part that matters, and it's why we'd rather you test than wait and see. Untreated chlamydia can spread upward from the cervix into the uterus and fallopian tubes, leading to pelvic inflammatory disease (PID). PID can cause:

  • Chronic pelvic pain
  • Scarring of the fallopian tubes
  • Increased risk of ectopic (tubal) pregnancy
  • Infertility in some cases

Here's the reassuring flip side: caught and treated early, chlamydia causes none of this. The damage comes from time, not from the infection itself being untreatable. Treatment is a short course of antibiotics, and it works.

When (and how) to get tested

Consider testing if you:

  • Have any of the symptoms above
  • Had a partner test positive or ask you to get checked
  • Have a new partner, or more than one partner
  • Are under 25 and sexually active (yearly screening is recommended)
  • Are pregnant (testing is part of routine prenatal care)

Testing is genuinely easy and not invasive: it's usually a urine sample or a self-collected vaginal swab — something you can often do yourself in a few seconds. No speculum required for the basic test. Many clinics and at-home kits make this private and quick.

If your test is positive

Take a breath — this is the most fixable part of the whole story.

  • Treatment is a short antibiotic course (commonly doxycycline for 7 days, or azithromycin in pregnancy). It's highly effective. See our breakdown of chlamydia treatment options.
  • Avoid sex until 7 days after treatment is complete (and until partners are treated), so you don't get reinfected.
  • Tell recent partners so they can be treated too. Many clinics can help you do this anonymously if that feels easier.
  • Retest in about 3 months, since reinfection is common — not because treatment failed, but because partners can pass it back.

Frequently asked questions

Can you have chlamydia for years and not know? Yes. Because it's so often symptomless, an infection can persist undetected. That's why screening — not symptom-watching — is the reliable approach.

Can chlamydia cause a smelly discharge? It can change your discharge, but a strong fishy odour is more typical of bacterial vaginosis. Overlapping symptoms are exactly why a test beats guessing.

Could it just be a UTI or yeast infection? Possibly — the symptoms overlap a lot. A test is the only way to tell them apart, and getting the right diagnosis means getting the right treatment.

Does chlamydia go away on its own? You shouldn't count on it. We cover the science in detail in our guide, "Can chlamydia go away on its own?"

You're not alone in this, and you're not "dirty" or careless for being here — chlamydia is one of the most common infections on the planet, and the people who deal with it well are simply the ones who test and treat. If you want to talk to others who've been exactly where you are, that's what our community is for.