There are rarely any symptoms if the infection is in the rectum (back passage) but it may cause discomfort and discharge. Infection in the eyes can cause pain, swelling, irritation and/or discharge. Infection in the throat is uncommon and usually has no symptoms.
Chlamydia tests are carried out by taking swabs from the penis, vagina, anus or throat. A urine sample can also be used with men. The sexual health clinic will recommend the best test for you depending on whether you have any symptoms, what they are and the type of sex you have.
Chlamydia can be treated with antibiotics and it is important that you complete the course. If you are treated for chlamydia, it is really important that your partner also gets treated before you have sex again to prevent reinfection.
If you visit a clinic, staff will explain your treatment and how to avoid further infections in the future. Do tell a member of staff if you think you may be pregnant as this may affect the type of antibiotic given. Remember, using condoms every time you have vaginal, anal or oral sex will significantly reduce the risk of getting or passing on STIs including chlamydia. Condoms can be used for different types of sex (anal, oral and vaginal).