Better Health Channel
  • Chlamydia is a very common sexually transmissible infection (STI). Most people with a chlamydia infection have no symptoms.
  • Chlamydia can infect the cervix, urethra, anus, throat and eyes.
  • Chlamydia is effectively treated with antibiotics.
  • If left untreated, chlamydia can cause pelvic inflammatory disease (PID) in people with a vagina and lead to chronic pain and infertility. 
  • In people with a penis, untreated chlamydia can cause pain and swelling in one or both testicles.
  • Partners of people with chlamydia also need to be informed, tested and treated as they may be infected too. If so, there is a risk they could reinfect their partner who has been treated for chlamydia.

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Reviewed on: 17-10-2023