The symptoms of an STI vary depending on the type of infection. However, most STIs are treatable if detected early enough. If you think you may have an infection, or if you've had unprotected sex, it's important to visit your GP, local family planning clinic or genitourinary medicine (GUM) clinic as soon as possible. If left untreated, STIs are not only uncomfortable and embarrassing but also can seriously affect your health and fertility. ::: body-ad-desktop zones:: 232632,232570,227380,232640 types:: 163 disclaimer:: AD typeFilter:: native adCount:: 3 ::: ::: body-ad-mobile zones:: 232632,232570,227380,232642 types:: 5 disclaimer:: ADVERTISEMENT typeFilter:: display adCount:: 1 :::