Chlamydia is passed on through unprotected sex (sex without a condom) and is particularly common in sexually active teenagers and young adults.

Most people with chlamydia do not notice any symptoms and do not know they have it.

If you do develop symptoms, you may experience:

  • pain when peeing
  • unusual discharge from the vagina, penis or bottom
  • in women, pain in the tummy, bleeding after sex and bleeding between periods
  • in men, pain and swelling in the testicles

If you think you’re at risk of having a sexually transmitted infection (STI) or have any symptoms of chlamydia, visit a GP who can organise for testing.