The reason for the occurrence of cervical erosion: 1, the higher level of estrogen in the body leads to, if the female reproductive function is more vigorous or take estrogen supplies, the level of estrogen in the body will be higher, will stimulate the columnar epithelium of the cervix to ectopic, from the cervical canal inward to outward move to cover the outside of the cervix. As the columnar epithelium is bright red in appearance and different in color from the surrounding squamous epithelium, it is often mistaken for pathological, which is actually a physiological phenomenon not to worry about. 2. Chronic inflammatory stimulation leads to cervical erosion if infected with pathogens such as trichomonas and mycobacteria, which can occur under the long-term action of such pathogens. The symptoms are increased leucorrhea, odor and lower abdominal swelling, which need to be treated accordingly to improve the symptoms. 3, cervical precancerous lesions, women who have cervical erosion should be screened for cervical cancer, and if abnormalities should be dealt with in time.