Cervical erosion is considered a physiological phenomenon, not a disease. It is part of the normal anatomical structure of females, characterized by a more apparent red appearance of the columnar epithelium on the cervix. This is due to the relatively high levels of estrogen in young women, which causes the columnar epithelium to evert from the cervical canal, resulting in a vigorous growth of the epithelium, and thus the red, erosion-like appearance. This is normal, and as age increases, the columnar epithelium gradually moves inward and is covered by squamous epithelium, resulting in a smooth appearance of the cervix.