The biggest problem with Chlamydia is that it is usually asymptomatic (has no symptoms) and this is exactly what makes it so dangerous. Even if you do not have the symptoms you can still pass the infection to your partner.

If symptoms do occur, they usually appear within 1 to 3 weeks after exposure.

In women, the infection first attacks the cervix and urethra. The symptoms that may appear are abnormal vaginal discharge or a burning sensation when urinating. If the infection spreads to the uterus and fallopian tubes, it can still be asymptomatic or cause problems like lower abdominal pain, low back pain, nausea, fever, pain during sex, and bleeding between menstrual periods.

Men who do experience signs or symptoms may have a discharge from their penises, burning and itching around the opening of the penis or a burning sensation during urination. Those who engage in anal sex may acquire Chlamydia infection in the rectum, which can cause rectal pain, discharge, or bleeding. Infection of the cervix can also spread to the rectum. Chlamydia can also be found in the throats of women and men having oral sex with an infected partner.