Health conditions

Sexually transmissible infections (STIs)

  • You may not have any obvious symptoms if you have an STI.
  • Left untreated, some STIs can make you infertile.
  • Always use condoms and dental dams when having sex.
  • If you have unprotected sex you should be tested for STIs.

What are STIs?

Sexually transmissible infections (STIs) are infections or diseases that are passed on during unprotected sex with an infected partner. This includes vaginal, anal or oral sex. Some STIs can be passed on by just skin-to-skin contact.

Common STIs include:

Other less common STIs include:

Who is most at risk?
What are the signs and symptoms?
How do I know if I have an STI?
How are STIs treated?
How can STIs be prevented?

Where to get help


Last reviewed: 30-11-2023
Acknowledgements

Public Health


This publication is provided for education and information purposes only. It is not a substitute for professional medical care. Information about a therapy, service, product or treatment does not imply endorsement and is not intended to replace advice from your healthcare professional. Readers should note that over time currency and completeness of the information may change. All users should seek advice from a qualified healthcare professional for a diagnosis and answers to their medical questions.

Anyone can be a HealthySexual: talk, test, protect