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Chlamydia is the most commonly diagnosed Sexually Transmitted Infection (STI) in the UK, affecting both men and women and rates are increasing. You do not have to have had lots of sexual partners, and it doesn’t just affect young people aged 16-24.

The important things to know about Chlamydia are:

  • For most people Chlamydia has no symptoms, so you probably won’t know you or your partner(s) have it unless you get tested.
  • If untreated Chlamydia can have serious long term health implications and may lead to infertility in both men and women.
  • Chlamydia is easily tested for and easy to treat.
  • Any form of unprotected sex (without a male/female condom or dental dam) can put you at risk of catching Chlamydia, including oral sex, intimate foreplay and sharing sex toys.

If you are under 25 you can get a free, confidential Chlamydia test from

You can also access Chlamydia tests from your General Practice, Sexual Health Clinic or Brook Clinic (under 25).

For further information about Chlamydia visit the NHS choices website