In literature worldwide is still commonly used the term erosion to describe red areas within cervix around the external orifice. In such cases with negative cytology result, for cervical cancer prevention, the electrocoagulation or electro-conisation or other destructive operations are routinely used. Without colposcopy verification such management is inappropriate. The physician treats but does not know what he treats. It may be both common ectopy or regeneration zone so physiologic cervical states but it may be also CIN or even early cervical cancer, however cytologically negative. The first group of lesions is effectively diagnosed with colposcopy without additional diagnostic procedures and the CIN lesions are diagnosed in high percentage of accuracy. Not all of these lesions should be treated. In the group of colposcopically and cytologically unsuspected lesions just very extensive lesions with active mucous glands should be treated. Such lesions cause recurrent cervical inflammation. All other erythroplakia type lesions demand no treatment. The presence of ectopy around the external cervical orifice is just profitable for diagnosis of epithelial changes and cervical physiologic processes observation. All cases of abnormal colposcopy or cytology results, suspected of CIN should be treated as prevention of cervical cancer. In lower CIN grades electroresection (LEEP) is recommended, while in higher grades the cervical conisation is the appropriate mode of treatment.