Cervical erosion should be referred to the cervical columnar epithelial ectasia, is a physiological phenomenon, usually no obvious symptoms, in serious cases, the symptoms include lower abdominal pain, abnormal increase in leukorrhea, and vaginal itching, etc., and the cause is mainly due to the role of estrogen, the columnar epithelium of the inner cervical canal to the outer cervical canal due to the external migration of the columnar epithelium. Cervical columnar epithelial ectasia is usually asymptomatic, physiological phenomenon, not easy to be detected. In severe cases, cervical columnar epithelial ectasia may spread to the pelvis, resulting in a painful drop in the abdomen. Cervical columnar epithelial ectasia may cause the color of leukorrhea to become yellowish or milky white, and in severe cases, blood-colored leukorrhea may occur. Cervical columnar epithelial ectasia also affects the vaginal environment, which may cause vaginal itching and pain. If any of these symptoms occur in the clinic, it is recommended to go to the hospital for early treatment.