Quick answer: Many men with chlamydia have no symptoms — about half notice nothing. When symptoms do appear, they usually start 1–3 weeks after exposure and can include a clear or cloudy discharge from the penis, burning when you pee, and itching or irritation inside the tip. Less often, it causes testicular pain and swelling. It's common, it's nothing to be embarrassed about, and a short course of antibiotics cures it.

If a partner told you to get checked, or something just feels different — getting informed is the right first move. Here's what to know.

Men get "silent" chlamydia too

There's a myth that chlamydia is mostly a women's-health issue, or that men "would know" if they had it. Neither is true. Estimates suggest up to half of men with chlamydia have no noticeable symptoms — and a symptomless infection is still contagious and still worth treating.

That's important for two reasons: you can pass it on without realising, and you can carry it long enough for it to occasionally cause complications. Testing is the only reliable way to know.

The symptoms to watch for

When chlamydia does cause symptoms in men, the most common are:

  • Discharge from the penis — often clear, white, or cloudy, sometimes noticeable in the morning
  • Burning or pain when you urinate
  • Itching, irritation, or a "tingling" feeling inside the urethra (the tip)
  • Pain or swelling in one or both testicles (less common, but a sign to act on quickly)

If you have receptive anal sex, chlamydia can infect the rectum, causing pain, discharge, or bleeding — though this is often silent too. Throat infections from oral sex usually cause no symptoms at all.

A useful reframe: these symptoms overlap with other infections like gonorrhoea and non-specific urethritis. So the symptoms tell you "get tested," not "here's exactly what it is." The test does the diagnosing.

How soon do symptoms appear?

When symptoms occur, they typically begin 1 to 3 weeks after exposure. Some men notice a mild irritation that comes and goes and dismiss it — but a symptom that fades doesn't mean the infection has. If you've had a possible exposure, the timing of testing matters more than the timing of symptoms (see our chlamydia testing-window guide).

Can chlamydia cause complications in men?

Yes, though serious complications are less common in men than the fertility risks seen in women. Untreated chlamydia can lead to:

  • Epididymitis — inflammation of the tube at the back of the testicle, causing pain and swelling. If you have sudden testicular pain, get seen promptly.
  • Reactive arthritis — in a small number of people, the immune response triggers joint inflammation, sometimes with eye irritation and urinary symptoms.
  • Passing it on — perhaps the most important "complication": an untreated infection keeps the chain going to every partner.

The reassuring part is the same as always: treated early, chlamydia clears without lasting harm.

When to get tested

Consider a test if you:

  • Notice any of the symptoms above
  • Had a partner test positive or ask you to get checked
  • Have a new partner or multiple partners
  • Have condomless sex outside a mutually tested relationship
  • Are due for a routine sexual-health check (a good habit even with no symptoms)

Testing for men is simple and non-invasive — usually just a urine sample. If you've had anal or oral sex, ask for a swab of those sites too, since a urine test alone can miss them. At-home kits exist if you'd rather keep it private.

If your test is positive

This is the easy part to fix:

  • Treatment is a short antibiotic course — commonly doxycycline twice daily for 7 days. It's highly effective. See our guide to chlamydia treatment.
  • Avoid sex until 7 days after treatment finishes and your partner(s) are treated — otherwise you can simply pass it back and forth.
  • Tell recent partners so they can be treated. Clinics can often help you do this discreetly.
  • Retest in 3 months, because reinfection from an untreated partner is common.

Frequently asked questions

Can men have chlamydia with no symptoms? Yes — around half do. No symptoms doesn't mean no infection, and it doesn't mean you can't pass it on.

Is penis discharge always chlamydia? No. Discharge can come from gonorrhoea or other causes of urethritis. The symptoms overlap, which is why a test is the only way to be sure.

Can chlamydia affect fertility in men? It's far less linked to infertility in men than in women, but untreated epididymitis can, rarely, affect fertility. Early treatment avoids this.

Does it ever go away by itself? Don't rely on it. We explain what the research actually shows in "Can chlamydia go away on its own?"

Being here doesn't say anything bad about you — chlamydia is one of the most common STIs in the world, and dealing with it is just basic maintenance, like any other health check. If you want straight talk and people who get it, our community is here for that.