Need emergency help? Call 999 in United Kingdom.

Open local help

Chlamydia

Find out about chlamydia, a sexually transmitted infection (STI), including symptoms, how it's treated, and how to prevent it.

About this information

This NHS content is written for people in England. Services, entitlements and contact routes may differ in other countries.

Symptoms of chlamydia

Most people who have chlamydia do not have any symptoms.

If you do get symptoms, they can start from 1 week to several months after infection.

Symptoms in women

Chlamydia can cause symptoms in women. These symptoms can affect anyone with a vagina:

  • vaginal discharge that is not normal for you
  • bleeding after sex or between periods
  • a burning feeling when you pee
  • pain in your lower tummy

Symptoms in men

Chlamydia can cause symptoms in men. These symptoms can affect anyone with a penis:

  • white, cloudy or watery discharge from the tip of your penis
  • burning and itching around the testicles (balls) and penis
  • pain and swelling in the testicles
  • a burning feeling when you pee

Other symptoms in men and women

Chlamydia can affect other parts of your body that come into contact with semen or vaginal fluid. This can cause:

  • pain, bleeding and discharge from your bottom
  • a sore throat
  • eye redness, pain and discharge

Go to a sexual health clinic or see a GP if:

  • you or a sexual partner think you might have chlamydia
  • you or a sexual partner have had sex without a condom
  • you're pregnant or planning to get pregnant and think you might have chlamydia
Find a sexual health clinic

What happens at your appointment

A doctor or nurse will ask about your symptoms and sexual partners. They may need to check your penis or vagina.

When you make your appointment, let them know if you'd like someone else to be in the room with you (a chaperone) – this could be someone you know, another doctor, nurse or a trained member of staff.

You may be asked to give a pee sample.

They may use a swab (like a cotton bud) to take a sample of fluid from your penis or vagina. You may be able to do the swab yourself.

They may also need to take a swab from your bottom (anus), throat or eyes if these areas are affected.

You can be tested even if you do not have any symptoms. You may also be offered tests for other sexually transmitted infections (STIs) at the same time.

Information

Contacting sexual partners

If you have chlamydia, your current and recent sexual partners need to be tested.

A sexual health clinic can help you contact your partners, or they can contact them for you.

Treatment for chlamydia

Chlamydia is treated with antibiotics. This may be a single dose, or tablets you take for 7 to 14 days.

Sometimes you may start treatment before the test results come back.

You may need to be tested again after treatment to check you no longer have chlamydia.

If you're pregnant, you'll be tested again 4 weeks after treatment.

Important

Avoid vaginal, anal or oral sex until you and your partner (if you have one) have finished treatment and tests show you no longer have chlamydia.

How to avoid getting and spreading chlamydia

Chlamydia is spread through vaginal fluid and semen. It can pass from person to person by having vaginal, oral or anal sex without a condom.

It can also be spread through vaginal fluid or semen that gets onto sex toys and your hands.

If you have chlamydia when you're pregnant, it can pass to your baby during birth.

There are some things you can do to avoid getting chlamydia and spreading it to others.

Do

  • use condoms when you have vaginal or anal sex

  • use a condom to cover the penis, or a latex or plastic square (dam) to cover the vagina if you have oral sex

  • get tested once a year, or if you have a new sexual partner

  • complete the full treatment if you or your sexual partner have chlamydia

Don't

  • do not share sex toys (if you do, wash and cover them with a new condom before anyone else uses them)

Complications of chlamydia

If chlamydia is not treated, it can lead to serious complications, including:

The sooner you get treatment, the easier these complications are to treat.

Chlamydia in pregnancy

If you're pregnant and have chlamydia that is not treated, it can be passed onto your baby during birth.

If this happens, it can cause an infection in your baby's eyes (conjunctivitis) or lungs (pneumonia). These infections can be treated with antibiotics.

Chlamydia

Symptoms

Chlamydia

Medical treatments

Chlamydia

Prevention

Chlamydia

Complications

Symptoms of chlamydia include unusual discharge from the penis or vagina and pain when peeing. Not everyone has symptoms.

Chlamydia is treated with antibiotics, which may start before your test result is known.

You can help prevent chlamydia by using a condom during sex and not sharing sex toys.

If treated early, chlamydia is unlikely to cause long-term problems. Without treatment, it can cause complications.

Content supplied by the NHS website

Content supplied by the NHS website, refreshed 19 August 2026. View the original NHS article ↗

Licensed under the Open Government Licence v3.0 ↗. MyPHU is independent and is not endorsed by the NHS.