Most people who have chlamydia have no symptoms.

If you do have symptoms, they may not appear until several weeks after you have sex with an infected partner.

Even when chlamydia causes no symptoms, it can damage your reproductive system.

Women with symptoms may notice

• An abnormal vaginal discharge;

• A burning sensation when urinating.

Symptoms in men can include

• A discharge from their penis;

• A burning sensation when urinating;

• Pain and swelling in one or both testicles (although this is less common).

Men and women can also get infected with chlamydia in their rectum. This happens either by having receptive anal sex, or by spread from another infected site (such as the vagina). While these infections often cause no symptoms, they can cause

• Rectal pain;

• Discharge;

• Bleeding.

You should be examined by your doctor if you notice any of these symptoms or if your partner has an STD or symptoms of an STD.

STD symptoms can include an unusual sore, a smelly discharge, burning when urinating, or bleeding between periods.