It is not. Cervical erosion, now known as “cervical columnar epithelial ectasia”, is a common physiological phenomenon in which the columnar epithelium of the inner cervical canal moves to the outer cervical canal due to the action of oestrogen, while the columnar epithelium is so thin that it appears to be erosion to the naked eye but is not a true ulcer; whereas cervical intraepithelial neoplasia is a condition in which the cervical epithelium is replaced by cells of varying degrees of heterogeneity due to various pathogenic factors. intraepithelial neoplasia is the replacement of the cervical epithelium by cells of varying degrees of anisotropy and is a disease state that needs to be taken seriously.