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Understanding chlamydia
Chlamydia is a common bacterial STI that often has no symptoms and is treated with antibiotics.
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What chlamydia is
Chlamydia is a bacterial infection passed on through unprotected vaginal, anal or oral sex, or by sharing sex toys. The NHS describes it as one of the most common STIs in the UK.
Symptoms
Most people with chlamydia do not notice symptoms. When present, they can include pain when urinating, unusual discharge, bleeding after sex or between periods in women, and pain in the testicles in men.
Why treatment matters
If left untreated, chlamydia can spread and cause complications such as pelvic inflammatory disease. It is usually treated with a course of antibiotics prescribed by a clinician. Recent partners should also be tested.
Testing
Testing usually uses a urine sample or a swab. Follow the sample instructions for your specific home screening kit, and have a positive result confirmed with a GP or sexual health clinic.
Related on CareFree Kits
Sources
- NHS – Chlamydia (nhs.uk/conditions/chlamydia)
Last reviewed 5 November 2026. This guide has not been clinically reviewed by a named professional.