Chlamydia is easily treated. However, if left untreated it can cause serious problems for the female reproductive system. Untreated chlamydia can cause pelvic inflammatory disease (PID) and can make it difficult for women to get pregnant. It can also cause ectopic pregnancies. Untreated chlamydia can also increase one's chance of being infected with HIV, the virus that causes AIDS.
The consistent use of dental dams and condoms is the best way to prevent chlamydia.