In obstetrics and gynecology, the diagnosis of cervical erosion has long been eliminated and replaced by cervical columnar epithelial ectasia. In fact, many so-called cervical erosions are not pathological, but a normal physiological phenomenon. So-called cervical erosion is a fine-grained red area in the appearance of the vaginal part of the cervix at the ectocervix. Previously, cervical erosion was also classified into 3 degrees according to the size of the cervical erosion area, with third degree, or severe, meaning that the erosion surface accounts for more than 2/3 of the entire cervical area. If the cervical erosion is only due to hormonal influence, the squamous epithelium outside the cervical opening and the columnar epithelium inside the cervix are displaced at the junction, because the columnar epithelium is thinner, so it will reveal the blood vessels below and appear redder, this is a normal phenomenon and there is nothing to worry about. If it is indeed caused by chronic inflammation of the cervix, there are corresponding treatments. Cervical erosion may be a normal physiological phenomenon and there is no necessary connection between it and cervical cancer, so there is no need to worry too much. However, cervical erosion and cervical precancer or early cervical cancer are difficult to distinguish from each other in terms of appearance, so cervical cytology, colposcopy and biopsy should be performed routinely for differential diagnosis.