Previously, cervical erosion was considered a manifestation of cervicitis. Recent research has proven that cervical erosion occurs when the epithelium inside the cervical canal grows out towards the external os and vaginal portion of the cervix, replacing the original epithelium at these sites. This results in a bright red appearance, visually similar to erosion, hence the term cervical erosion. Since the outward migration of the endometrium is a physiological phenomenon that typically retracts back into the cervical canal as age increases, cervical erosion generally does not require treatment if there is no inflammation.