Chlamydia is the most widespread STI in the UK, however more than half of those who have it will not have any symptoms. It is most common in young people under the age of 25 but is also affecting an increasing number of older people.
The infection is caused by Chlamydia Trachomatis, bacteria that can be found in vaginal fluids of infected women and semen of infected men. Infection can occur through any form of unprotected sex with an infected person.
The most common symptoms include:
Chlamydia is usually treated with antibiotics.