Sexually transmitted infections (STIs) are caused by bacteria, viruses or parasites that can be passed from one person to another during sex or intimate contact.
The majority of STIs are passed between sexual partners through unprotected oral, vaginal or anal sex - especially if you don’t use a condom.
The only way to know if you have an STI is to have an STI test. If you have regular unprotected sex, or have changed sexual partners it is a good idea to get tested as most STIs can be treated very easily without any long term complications. When you attend for a check-up you’ll be advised on how often a routine checkup is recommended for you. For advice on STIs visit one of our clinics.
You can also find out more about STIs by visiting https://sh24.org.uk/sexual-health/stis.