Chlamydia infection is an infectious disease, mainly through sexual transmission. Chlamydia trachomatis infection will lead to female genital tract infection, which is a sexually transmitted disease. Chlamydia trachomatis infection is a sexually transmitted disease, which will cause inflammation of the cervix, which is manifested in the increase of vaginal purulent secretions, bleeding after sexual intercourse, and the cervix will appear hypertrophy, erosion, and follicular changes. A few patients can also have endometritis or salpingitis, which can lead to infertility or ectopic pregnancy. After contracting chlamydia trachomatis during pregnancy, miscarriage, premature delivery, stillbirth, perinatal infection, and conjunctivitis and pneumonia may also occur when newborns are infected with the birth canal.