The accuracy of colposcopy proposed diagnosis of HSIL is high, about 60-80%, and colposcopy is indicated for those with abnormal cervical epithelial cytology. Colposcopy is used to determine the presence of lesions in the cervical epithelium by applying acetic acid and iodine solutions to the surface of the cervix and observing changes in the epithelium and blood vessels. Both immature epithelial chemosis and low-grade intraepithelial lesions usually show thin acetic acid whites, and therefore immature chemosis and low-grade lesions are not well differentiated from each other by the color of the white of the acetic acid alone. However, high-grade lesions have a stronger reaction to the acetowhite, and the site of the strong reaction is usually selected for biopsy. Colposcopy has a false positive rate, so in most cases a biopsy is needed to confirm the diagnosis. Women are advised to undergo regular cervical cancer screening and consult a gynecologist for early intervention and treatment if abnormalities are detected.