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Sexually Transmitted Infections (STIs)

Sexually Transmitted Infections (STIs)

Sexually transmitted infections (STIs) are diseases passed on from one person to another through vaginal, anal or oral sex, as well as through genital contact with an infected partner. 

Common STIs in the UK include chlamydia, genital warts and gonorrhoea - and the sooner an STI is treated, the less long term damage will be caused.

It's possible to have more than one STI at a time and the only way to be sure that you don't have an infection is to be tested.

Click on the links below for more information about different STIs, their symptoms and treatment.

If you're worried you may have an STI click here to find the nearest and most appropriate service for you.


Chlamydia is the most common sexually transmitted infection in the UK and affects both men and women. Without a test you probably wouldn't even know if you had it - there are usually no obvious symptoms.