What does cervical erosion I mean?

Cervical erosion I refers to cervical columnar epithelium ectopic I degree, belongs to mild columnar epithelium ectopic, outward migration area is less than 1/3 of the entire cervical area.

Cervical columnar epithelium ectopic is due to long-term estrogen stimulation, resulting in a normal phenomenon of columnar epithelium outward migration to the outer mouth of the cervical canal. Cervical columnar epithelium ectopic is mainly divided into three degrees, I degree mainly refers to mild columnar epithelium ectopic, outward migration less than 1/3 of the entire cervix; II degree is moderate cervical columnar epithelium ectopic, outward migration more than 1/3 of the entire cervix, but less than 2/3 of the entire cervix; Grade III is severe cervical columnar epithelium ectopia, which may exceed more than 2/3 of the whole cervix, and the cervix shows hemorrhagic changes.