Chlamydia trachomatis can involve the eyes, reproductive tract, rectum and other organs, and the common ways of transmission include sexual transmission, close contact and breastfeeding, etc., in which unclean sex and multiple sexual partners are the important causes of chlamydia infection. Chlamydia trachomatis involving the eye can cause eye pain, photophobia, tearing, redness and swelling and other symptoms, and in severe cases can cause corneal opacification, impairing the patient’s eyesight, and need to be treated with levofloxacin eye drops, rifampicin eye drops and other treatments. When Chlamydia trachomatis involves the reproductive tract, men will manifest urethritis, epididymitis, prostatitis, and women will lead to pelvic inflammatory disease, ectopic pregnancy, infertility, etc., and need to follow the doctor’s advice to use minocycline, doxycycline and other treatments. It is recommended that patients with Chlamydia trachomatis should seek timely medical attention to evaluate their condition and follow the doctor’s instructions for treatment.