A negative gynecological examination for Chlamydia trachomatis means that there is no infection with this pathogenic bacteria so far. Chlamydia trachomatis infection may cause the following symptoms: 1) increased and yellowish vaginal discharge; 2) local itching of the vulva; 3) irritation of the urinary tract, such as urinary urgency, frequency and painful urination. It is possible that chlamydia is the cause of the above symptoms. Chlamydia is transmitted through sexual contact and is one of the sexually transmitted diseases, so it is important to actively treat chlamydia once it is detected. In addition, women should pay attention to menstrual hygiene in their daily lives, pay attention to sexual hygiene and strengthen the local care of the vulva to reduce the possibility of inflammatory infections.