Sexually transmitted infections (STI)
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/teens-feet_h-86a509.jpg)
Chlamydia
Chlamydia is a common sexually transmitted infection (STI) that may cause no symptoms. Learn about prevention, testing, contact tracing and treatment.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/boxers-on-clothesline_h-9445f2.jpg)
Genital herpes
Genital herpes spreads by skin-to-skin contact, like kissing or foreplay. Learn how to prevent the spread of the virus and what to do if you catch it.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/genital_warts_h-ff3c59.jpg)
Genital warts
Genital warts are a sexually transmitted infection that causes bumps on the genital areas. Learn about their treatment and prevention.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/gonorrhoea-the-clap-e70fa4.jpg)
Gonorrhoea (the clap)
Gonorrhoea, also known as 'the clap,' is a bacterial STI. Learn about symptoms, diagnosis, treatment, and prevention in this concise guide.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/hepatitis-b-de09e7.jpg)
Hepatitis B
Hepatitis B can lead to liver damage over time. If you have hepatitis B, it is important to protect others from infection. Find out how.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/hiv-infection-and-aids-48bdc1.jpg)
HIV infection and AIDS
People with HIV are unlikely to transmit the virus or develop AIDS if they get effective treatment. Learn about HIV prevention, testing and treatment.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/safe-sex-bf32e9.jpg)
Safe sex
Practicing safe sex helps reduce the spread of sexually transmitted infection (STIs) and minimises the risk of unplanned pregnancy.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/couple-in-bed_h-3afdd8.jpg)
Syphilis
Syphilis is a sexually transmitted infection (STI) that can cause serious health problems if left untreated. Find out more about syphilis here.
![](https://media.healthdirect.org.au/images/theme_promo/w760h217/trichomoniasis-16b216.jpg)
Trichomoniasis
Trichomoniasis is an infection usually spread via unprotected sex, but occasionally via sharing wet towels. Learn about treatment and prevention.