Chlamydia does not cause long-term problems if it is treated before any complications develop. Left untreated, chlamydia can lead to many complications, especially for women. If a woman has chlamydia when she gives birth, her newborn can be infected.
Having a chlamydia infection that was cured does not protect you from a future infection. A new exposure to chlamydia will reinfect you, even if you were treated and cured.
Lymphogranuloma venereum, or LGV. This is caused by a type of chlamydia that is usually rare in the United States, but it is becoming more common in men who have sex with men. It causes open sores in the genital area, headache, fever, fatigue, and swelling of the lymph nodes in the groin. It also causes proctitis in people who get chlamydia through anal sex.