The cause of cervical erosion is the change in estrogen levels in the body, which is a physiological morphological change of the cervix that does not require treatment and can recover on its own. Cervical erosion, which is usually detected during gynecological examinations, is now called “cervical columnar epithelial ectasia”, which is a physiological phenomenon. It is caused by changes in the hormone levels in the woman’s body. It is caused by ectropion of the columnar epithelium in the cervical area near the uterus. Before puberty, when estrogen is low, the cervical columnar epithelium is more on the inner side; after menarche, under the influence of estrogen, the columnar epithelium cells turn more on the outer side, so that when the cervical opening is examined, a columnar epithelium similar to “erosion” is found. After menopause, the estrogen level decreases and the columnar epithelium starts to turn back inward again, at which point the cervical erosion disappears. Since cervical erosion is mostly asymptomatic, it can cause increased leucorrhea, contact bleeding, irregular vaginal bleeding, etc. If these symptoms occur, it is recommended to seek medical attention for timely and symptomatic treatment. Therefore, cervical erosion, which is actually columnar epithelial ectropion, need not be too much worried. However, regular examination of the cervix is necessary, not to prevent cervical erosion, but to prevent cervical cancer. As long as the result is negative, there is no need to worry too much.