Vaginal endoscopy refers to colposcopy, which is a method of examining diseases using a magnifying glass-type optical speculum outside the body. Colposcopy is an examination method that uses a speculum to expose the vagina and cervix, then extends a magnifying glass-type optical speculum into the vagina and directly observes the blood vessels and epithelial structure of the area after exposing the examination site 5 to 40 times, which can detect relevant lesions in a timely manner, and directly biopsy the suspected area to improve the detection rate of diseases. If you suffer from acute, subacute genital inflammation, pelvic inflammatory diseases and other patients should not carry out colposcopy, before the examination, patients should prohibit sexual intercourse for more than 24 hours, avoid intravaginal drugs, so as not to affect the results of the examination. Colposcopy should be performed under the operation of a professional physician, and early treatment of abnormalities can improve the prognosis of patients.